diff --git a/.github/actions/setup-build/action.yml b/.github/actions/setup-build/action.yml
new file mode 100644
index 00000000..867dc53e
--- /dev/null
+++ b/.github/actions/setup-build/action.yml
@@ -0,0 +1,585 @@
+name: setup-build
+description: >-
+  Set up the build environment by installing necessary tools and dependencies.
+  When necessary, it sets CPATH, LIBRARY_PATH, LD_LIBRARY_PATH, FORMPATH,
+  DISTNAME and CONFIG_ARGS, and runs autoreconf or extracts a tar.gz archive,
+  followed by executing ./configure.
+inputs:
+  features:
+    description: A list of features to enable, separated by spaces. To disable a feature, prefix it with "no".
+    required: false
+    default: ''
+  flint_version:
+    description: FLINT version to build.
+    required: false
+    default: '3.3.1'
+
+runs:
+  using: composite
+  steps:
+    - name: Initialize setup
+      id: setup
+      env:
+        available_features: >-
+          form=false tform=false parform=false vorm=false tvorm=false parvorm=false
+          flint=true ginac=false gmp=true mpfr=true zlib=true zstd=true
+          mpich=false openmpi=false
+          bash=false msys2=false debian=false container=false
+          untar=false autoreconf=false configure=true deploy=false
+          coverage=false hyperfine=false valgrind=false
+          build_flint=false
+          automake=false diffutils=false gcc=true git=false ruby=true wget=false
+          latex=false latex2html=false
+          formlib=false color=false forcer=false series=false
+        # NOTE: Some features and OS image combinations are not implemented.
+      shell: bash
+      run: |
+        ### Initialize setup ###
+
+        # First, parse the input.
+
+        available_features=$(echo "$available_features" | awk '{$1=$1; print}')
+
+        feature_names=''
+        for entry in $available_features; do
+          # Get "name=value".
+          feat_name=$(echo "$entry" | cut -d '=' -f 1)
+          feat_value=$(echo "$entry" | cut -d '=' -f 2)
+          feature_names="$feature_names $feat_name"
+          # Initialize the feature variable.
+          eval "feat_${feat_name}=${feat_value}"
+        done
+        feature_names=$(echo "$feature_names" | awk '{$1=$1; print}')
+
+        input_features=$(echo "${{ inputs.features }}" | awk '{$1=$1; print}')
+        feature_pattern='^('$(echo "$feature_names" | tr ' ' '|')')$'
+        no_feature_pattern='^('$(echo "no$feature_names" | sed 's/ /|no/g')')$'
+
+        for feat in $input_features; do
+          if [[ $feat =~ $feature_pattern ]]; then
+            eval "feat_${feat}=true"
+          elif [[ $feat =~ $no_feature_pattern ]]; then
+            feat=${feat#no}
+            eval "feat_${feat}=false"
+          else
+            echo "Error: unknown feature: $feat" >&2
+            exit 1
+          fi
+        done
+
+        # Some features are enabled automatically,
+        # while others may require extra setup.
+
+        has_scalar=false
+        has_threaded=false
+        has_mpi=false
+        has_bin=false
+        if $feat_form || $feat_vorm; then
+          has_scalar=true
+        fi
+        if $feat_tform || $feat_tvorm; then
+          has_threaded=true
+        fi
+        if $feat_parform || $feat_parvorm; then
+          has_mpi=true
+        fi
+        if $has_scalar || $has_threaded || $has_mpi; then
+          has_bin=true
+        fi
+
+        if ! $has_bin; then
+          feat_flint=false
+          feat_ginac=false
+          feat_gmp=false
+          feat_mpfr=false
+          feat_zlib=false
+          feat_zstd=false
+        fi
+
+        if $has_mpi && ! $feat_mpich && ! $feat_openmpi; then
+          # Use OpenMPI by default because MPICH is broken on Ubuntu 24.04.
+          # See: https://bugs.launchpad.net/ubuntu/+source/mpich/+bug/2072338
+          feat_openmpi=true
+        fi
+
+        # Unfortunately, FLINT packages in many distributions lack a static
+        # library, as it is not built by default. These packages are also often
+        # outdated (version < 3.2.0). In such cases, we build FLINT from source.
+        if $feat_flint; then
+          if [[ "${{ runner.os }}" == "macOS" ]] && ! $feat_deploy; then
+            :
+          else
+            feat_build_flint=true
+          fi
+        fi
+
+        if [ -f /etc/os-release ] && grep -qi '^ID=debian' /etc/os-release; then
+          feat_debian=true
+        fi
+
+        if [ -f /.dockerenv ]; then
+          feat_container=true
+        fi
+
+        if [ ! -f configure.ac ] && ls form-*.tar.gz 1>/dev/null 2>&1; then
+          feat_untar=true
+        fi
+
+        if [ ! -f configure ] && [ -f configure.ac ]; then
+          feat_autoreconf=true
+        fi
+
+        if $feat_formlib; then
+          feat_color=true
+          feat_forcer=true
+          feat_series=true
+        fi
+
+        if $feat_color || $feat_forcer || $feat_series; then
+          feat_formlib=true
+          items=''
+          $feat_color && items="$items-color-1.0.0"
+          $feat_forcer && items="$items-forcer-1.0.0"
+          $feat_series && items="$items-series-1.0.0"
+          echo "formlib_key=formlib$items" >>"$GITHUB_OUTPUT"
+          echo "formlib_restore_keys=formlib-" >>"$GITHUB_OUTPUT"
+          echo "FORMPATH=${{ github.workspace }}/formlib" >>"$GITHUB_ENV"
+        fi
+
+        # Dependencies.
+
+        if $build_feat_flint; then
+          feat_diffutils=true
+          feat_gcc=true
+          feat_mpfr=true
+          feat_wget=true
+        fi
+
+        if $feat_formlib; then
+          feat_wget=true
+        fi
+
+        if $feat_autoreconf; then
+          feat_automake=true
+          feat_git=true
+        fi
+
+        # Output the features (without "feat_" prefix).
+
+        for feat in $feature_names; do
+          value=$(eval "echo \$feat_${feat}")
+          echo "  $feat=$value"
+          echo "$feat=$value" >>"$GITHUB_OUTPUT"
+        done
+
+        # Construct arguments for the configure script.
+
+        args='--disable-dependency-tracking'
+
+        if $has_scalar; then
+          args="$args --enable-scalar"
+        else
+          args="$args --disable-scalar"
+        fi
+        if $has_threaded; then
+          args="$args --enable-threaded"
+        else
+          args="$args --disable-threaded"
+        fi
+        if $has_mpi; then
+          args="$args --enable-parform"
+        else
+          args="$args --disable-parform"
+        fi
+
+        if $feat_vorm || $feat_tvorm || $feat_parvorm; then
+          args="$args --enable-debug"
+        fi
+
+        if $feat_coverage; then
+          args="$args --enable-coverage"
+        fi
+
+        if $has_bin; then
+          if $feat_deploy; then
+            # Avoid compiler optimizations specific to the build host.
+            args="$args --disable-native"
+            # Enable static linking whenever possible.
+            if [[ "${{ runner.os }}" != "macOS" ]]; then
+              args="$args --enable-static-link"
+            fi
+          fi
+          if [[ "${{ runner.os }}" == "Windows" ]]; then
+            args="$args --with-api=windows"
+          else
+            args="$args --with-api=posix"
+          fi
+        else
+          # This avoids checking optimization flags.
+          args="$args --disable-native"
+        fi
+
+        if $feat_gmp; then
+          args="$args --with-gmp"
+        else
+          args="$args --without-gmp"
+        fi
+
+        if $feat_mpfr; then
+          args="$args --with-mpfr"
+        else
+          args="$args --without-mpfr"
+        fi
+
+        if $feat_zlib; then
+          args="$args --with-zlib"
+        else
+          args="$args --without-zlib"
+        fi
+
+        if $feat_zstd; then
+          args="$args --with-zstd"
+        else
+          args="$args --without-zstd"
+        fi
+
+        if $feat_flint; then
+          args="$args --with-flint"
+        else
+          args="$args --without-flint"
+        fi
+
+        if $feat_ginac; then
+          args="$args --with-ginac"
+        # else
+        #   args="$args --without-ginac"
+        fi
+
+        echo "config_args=$args" >>"$GITHUB_OUTPUT"
+
+        if ! $feat_configure; then
+          echo "CONFIG_ARGS=$args" >>"$GITHUB_ENV"
+        fi
+
+        # Determine DISTNAME if possible.
+
+        if [ -f ./scripts/git-version-gen.sh ] && command -v git >/dev/null 2>&1; then
+          echo "DISTNAME=form-$(./scripts/git-version-gen.sh -r | sed '2q;d' | sed 's/^v//')" >>"$GITHUB_ENV"
+        fi
+
+    - name: Install dependencies (Ubuntu)
+      if: runner.os == 'Linux' && steps.setup.outputs.container == 'false'
+      uses: awalsh128/cache-apt-pkgs-action@a605dbde2ac49a823c9c87ad58491b51848bf355  # for empty_packages_behavior
+      with:
+        # We assume libgmp-dev and zlib1g-dev are always installed.
+        packages: >-
+          ${{ steps.setup.outputs.hyperfine == 'true' && 'hyperfine' || '' }}
+          ${{ steps.setup.outputs.coverage == 'true' && 'lcov' || '' }}
+          ${{ steps.setup.outputs.ginac == 'true' && 'libginac-dev' || '' }}
+          ${{ steps.setup.outputs.mpfr == 'true' && 'libmpfr-dev' || '' }}
+          ${{ steps.setup.outputs.zstd == 'true' && 'libzstd-dev' || '' }}
+          ${{ steps.setup.outputs.valgrind == 'true' && 'valgrind' || '' }}
+        version: 1.0
+        empty_packages_behavior: ignore
+
+    # awalsh128/cache-apt-pkgs-action does not work for MPI.
+    # See: https://github.com/awalsh128/cache-apt-pkgs-action/issues/57#issuecomment-1304062077
+    - name: Install MPI if necessary
+      if: >-
+        runner.os == 'Linux'
+        && steps.setup.outputs.container == 'false'
+        && (steps.setup.outputs.mpich == 'true' || steps.setup.outputs.openmpi == 'true')
+      shell: bash
+      run: |
+        ### Install MPI ###
+
+        sudo apt-get update
+        sudo apt-get install -y -q \
+          ${{ steps.setup.outputs.mpich == 'true' && 'libmpich-dev' || '' }} \
+          ${{ steps.setup.outputs.openmpi == 'true' && 'libopenmpi-dev' || '' }}
+
+    # Currently, cache-apt-pkgs-action does not work for LaTeX.
+    # See: https://github.com/awalsh128/cache-apt-pkgs-action/issues/57
+    - name: Install LaTeX
+      if: runner.os == 'Linux' && (steps.setup.outputs.latex == 'true' || steps.setup.outputs.latex2html == 'true')
+      shell: bash
+      run: |
+        ### Install LaTeX ###
+
+        sudo apt-get update
+        sudo apt-get install -y -q \
+          ${{ steps.setup.outputs.latex == 'true' && 'texlive-latex-extra' || '' }} \
+          ${{ steps.setup.outputs.latex2html == 'true' && 'latex2html' || '' }}
+
+    # Because we use i386/debian containers, here we do not assume that
+    # awalsh128/cache-apt-pkgs-action works properly.
+    # See: https://github.com/actions/cache/issues/675
+    - name: Install dependencies (Debian)
+      if: steps.setup.outputs.debian == 'true' && steps.setup.outputs.container == 'true'
+      shell: bash
+      run: |
+        ### Install dependencies ###
+
+        apt-get update
+        apt-get install -y -q make \
+          ${{ steps.setup.outputs.automake == 'true' && 'automake' || '' }} \
+          ${{ steps.setup.outputs.gcc == 'true' && 'g++' || '' }} \
+          ${{ steps.setup.outputs.git == 'true' && 'git' || '' }} \
+          ${{ steps.setup.outputs.hyperfine == 'true' && 'hyperfine' || '' }} \
+          ${{ steps.setup.outputs.coverage == 'true' && 'lcov' || '' }} \
+          ${{ steps.setup.outputs.ginac == 'true' && 'libginac-dev' || '' }} \
+          ${{ steps.setup.outputs.gmp == 'true' && 'libgmp-dev' || '' }} \
+          ${{ steps.setup.outputs.mpfr == 'true' && 'libmpfr-dev' || '' }} \
+          ${{ steps.setup.outputs.zstd == 'true' && 'libzstd-dev' || '' }} \
+          ${{ steps.setup.outputs.ruby == 'true' && 'ruby' || '' }} \
+          ${{ steps.setup.outputs.valgrind == 'true' && 'valgrind' || '' }} \
+          ${{ steps.setup.outputs.wget == 'true' && 'wget' || '' }} \
+          ${{ steps.setup.outputs.zlib == 'true' && 'zlib1g-dev' || '' }}
+
+    - name: Install dependencies (macOS)
+      if: >-
+        runner.os == 'macOS' && (
+          steps.setup.outputs.automake == 'true'
+          || (steps.setup.outputs.flint == 'true' && steps.setup.outputs.build_flint == 'false')
+          || steps.setup.outputs.hyperfine == 'true'
+        )
+      shell: bash
+      run: |
+        ### Install dependencies ###
+
+        brew install \
+          ${{ steps.setup.outputs.automake == 'true' && 'automake' || '' }} \
+          ${{ (steps.setup.outputs.flint == 'true' && steps.setup.outputs.build_flint == 'false') && 'flint' || '' }} \
+          ${{ steps.setup.outputs.hyperfine == 'true' && 'hyperfine' || '' }}
+
+    # --static fails on macOS but we want to statically link
+    # the brewed gmp. The linker supports neither -Wl,-static nor
+    # -l:libgmp.a to make partial static links possible.
+    # As a workaround, we make a library directory with libgmp.a
+    # but without libgmp.dylib so that the linker has to link libgmp.a.
+    # The same for other libraries.
+    # Note that the Homebrew installation path for Apple Silicon (arm64)
+    # differs from the one on macOS Intel (x86-64).
+    - name: Set up statically linked libraries (macOS)
+      if: runner.os == 'macOS' && steps.setup.outputs.deploy == 'true'
+      shell: bash
+      run: |
+        ### Set up statically linked libraries ###
+
+        mkdir static-lib
+        if [ "${{ runner.arch }}" == "ARM64" ]; then
+          brew_dir=/opt/homebrew/opt
+          # Include directories, not located in the usual places,
+          # must be explicitly appended to the include paths.
+          CPATH="$brew_dir/gmp/include:$brew_dir/mpfr/include:$brew_dir/zstd/include${CPATH:+":$CPATH"}"
+          echo "CPATH=$CPATH" >>"$GITHUB_ENV"
+        else
+          brew_dir=/usr/local/opt
+        fi
+        ln -s "$brew_dir/gmp/lib/libgmp.a" static-lib/libgmp.a
+        ln -s "$brew_dir/mpfr/lib/libmpfr.a" static-lib/libmpfr.a
+        ln -s "$brew_dir/zstd/lib/libzstd.a" static-lib/libzstd.a
+        LIBRARY_PATH="${{ github.workspace }}/static-lib${LIBRARY_PATH:+":$LIBRARY_PATH"}"
+        echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
+
+    - name: Set up Homebrew paths (macOS/arm64)
+      if: runner.os == 'macOS' && runner.arch == 'ARM64' && steps.setup.outputs.deploy == 'false'
+      shell: bash
+      run: |
+        ### Set up Homebrew paths ###
+
+        brew_dir=/opt/homebrew/opt
+        CPATH="$brew_dir/flint/include:$brew_dir/gmp/include:$brew_dir/mpfr/include:$brew_dir/zstd/include${CPATH:+":$CPATH"}"
+        echo "CPATH=$CPATH" >>"$GITHUB_ENV"
+        LIBRARY_PATH="$brew_dir/flint/lib:$brew_dir/gmp/lib:$brew_dir/mpfr/lib:$brew_dir/zstd/lib${LIBRARY_PATH:+":$LIBRARY_PATH"}"
+        echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
+        LD_LIBRARY_PATH="$brew_dir/flint/lib:$brew_dir/gmp/lib:$brew_dir/mpfr/lib:$brew_dir/zstd/lib${LD_LIBRARY_PATH:+":$LD_LIBRARY_PATH"}"
+        echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >>"$GITHUB_ENV"
+
+    # NOTE: On MSYS2, autoconf (= autoconf-wrapper) is not listed as
+    # a dependency of automake (= automake-wrapper).
+    # Both need to be installed explicitly.
+    - name: Install dependencies (Windows/x86_64)
+      if: runner.os == 'Windows' && runner.arch == 'X64' && steps.setup.outputs.msys2 == 'true'
+      uses: msys2/setup-msys2@v2
+      with:
+        update: true
+        msystem: mingw64
+        install: >-
+          make
+          ${{ steps.setup.outputs.automake == 'true' && 'autoconf automake' || '' }}
+          ${{ steps.setup.outputs.git == 'true' && 'git' || '' }}
+          ${{ steps.setup.outputs.diffutils == 'true' && 'mingw-w64-x86_64-diffutils' || '' }}
+          ${{ steps.setup.outputs.gcc == 'true' && 'mingw-w64-x86_64-gcc' || '' }}
+          ${{ steps.setup.outputs.gmp == 'true' && 'mingw-w64-x86_64-gmp' || '' }}
+          ${{ steps.setup.outputs.hyperfine == 'true' && 'mingw-w64-x86_64-hyperfine' || '' }}
+          ${{ steps.setup.outputs.mpfr == 'true' && 'mingw-w64-x86_64-mpfr' || '' }}
+          ${{ steps.setup.outputs.ruby == 'true' && 'mingw-w64-x86_64-ruby' || '' }}
+          ${{ steps.setup.outputs.zlib == 'true' && 'mingw-w64-x86_64-zlib' || '' }}
+          ${{ steps.setup.outputs.zstd == 'true' && 'mingw-w64-x86_64-zstd' || '' }}
+
+    - name: Install dependencies (Windows/arm64)
+      if: runner.os == 'Windows' && runner.arch == 'ARM64' && steps.setup.outputs.msys2 == 'true'
+      uses: msys2/setup-msys2@v2
+      with:
+        update: true
+        msystem: clangarm64
+        install: >-
+          m4
+          make
+          ${{ steps.setup.outputs.automake == 'true' && 'autoconf automake' || '' }}
+          ${{ steps.setup.outputs.git == 'true' && 'git' || '' }}
+          ${{ steps.setup.outputs.diffutils == 'true' && 'mingw-w64-clang-aarch64-diffutils' || '' }}
+          ${{ steps.setup.outputs.gcc == 'true' && 'mingw-w64-clang-aarch64-gcc-compat' || '' }}
+          ${{ steps.setup.outputs.gmp == 'true' && 'mingw-w64-clang-aarch64-gmp' || '' }}
+          ${{ steps.setup.outputs.hyperfine == 'true' && 'mingw-w64-clang-aarch64-hyperfine' || '' }}
+          ${{ steps.setup.outputs.mpfr == 'true' && 'mingw-w64-clang-aarch64-mpfr' || '' }}
+          ${{ steps.setup.outputs.ruby == 'true' && 'mingw-w64-clang-aarch64-ruby' || '' }}
+          ${{ steps.setup.outputs.zlib == 'true' && 'mingw-w64-clang-aarch64-zlib' || '' }}
+          ${{ steps.setup.outputs.zstd == 'true' && 'mingw-w64-clang-aarch64-zstd' || '' }}
+
+    - name: Get cache key for the image
+      id: cache_key
+      if: steps.setup.outputs.build_flint == 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Get cache key for the image ###
+
+        # See: https://github.com/actions/upload-artifact/issues/231
+        echo "image_key=$ImageOS-$ImageVersion" >>"$GITHUB_OUTPUT"
+
+    - name: Cache FLINT
+      id: cache-flint
+      if: steps.setup.outputs.build_flint == 'true'
+      uses: actions/cache@v4
+      with:
+        path: lib/flint
+        # Here, we set a conservative cache key so that the cache is not reused
+        # when the version or environment changes even slightly.
+        key: flint-${{ inputs.flint_version }}-${{ runner.os }}-${{ runner.arch }}-${{ steps.cache_key.outputs.image_key }}
+
+    # Note that we always set --enable-static so that release and non-release
+    # builds can share the same cache.
+    - name: Build FLINT unless cached
+      if: steps.setup.outputs.build_flint == 'true' && steps.cache-flint.outputs.cache-hit != 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Build FLINT ###
+
+        mkdir -p build/flint
+        cd build/flint
+        # We use the tarball from GitHub Releases.
+        # See: https://github.com/flintlib/flint/issues/2311
+        wget "https://github.com/flintlib/flint/releases/download/v${{ inputs.flint_version }}/flint-${{ inputs.flint_version }}.tar.gz"
+        tar -xf "flint-${{ inputs.flint_version }}.tar.gz"
+        rm "flint-${{ inputs.flint_version }}.tar.gz"
+        cd "flint-${{ inputs.flint_version }}"
+        ./configure --prefix="${{ github.workspace }}/lib/flint" --host="$(gcc -dumpmachine)" --enable-static
+        make -j 4
+        make install
+
+    - name: Set FLINT paths
+      if: steps.setup.outputs.build_flint == 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Set FLINT paths ###
+
+        CPATH="${{ github.workspace }}/lib/flint/include${CPATH:+":$CPATH"}"
+        echo "CPATH=$CPATH" >>"$GITHUB_ENV"
+        LIBRARY_PATH="${{ github.workspace }}/lib/flint/lib${LIBRARY_PATH:+":$LIBRARY_PATH"}"
+        echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
+        if ${{ steps.setup.outputs.deploy }}; then
+          if [[ "${{ runner.os }}" == "macOS" ]]; then
+            # For static linking.
+            LIBRARY_PATH="${{ github.workspace }}/static-lib:$LIBRARY_PATH"
+            echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
+            ln -s "${{ github.workspace }}/lib/flint/lib/libflint.a" static-lib/libflint.a
+          fi
+        else
+          if [[ "${{ runner.os }}" != "Windows" ]]; then
+            LD_LIBRARY_PATH="${{ github.workspace }}/lib/flint/lib${LD_LIBRARY_PATH:+":$LD_LIBRARY_PATH"}"
+            echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >>"$GITHUB_ENV"
+          else
+            # MSYS2 ignores modifications to $PATH via standard methods.
+            # See: https://github.com/msys2/setup-msys2/issues/98
+            # As a simple workaround, copy the DLLs to a directory in the PATH.
+            cp lib/flint/bin/libflint*.dll /mingw64/bin/
+          fi
+        fi
+
+    - name: Cache FORM library
+      id: cache-formlib
+      if: steps.setup.outputs.formlib == 'true'
+      uses: actions/cache@v4
+      with:
+        path: formlib
+        key: ${{ steps.setup.outputs.formlib_key }}
+        restore-keys: ${{ steps.setup.outputs.formlib_restore_keys }}
+
+    - name: Install FORM libraries if necessary
+      if: steps.setup.outputs.formlib == 'true' && steps.cache-formlib.outputs.cache-hit != 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Install FORM libraries ###
+
+        mkdir -p formlib
+        if ${{ steps.setup.outputs.color }} && [ ! -f formlib/color-1.0.0 ]; then
+          rm -rf formlib/color*
+          wget https://github.com/form-dev/form-packages/archive/refs/tags/v1.0.0.tar.gz -O - | tar -x --gzip
+          mv form-packages-1.0.0/color/color.h formlib/
+          rm -rf form-packages-1.0.0
+          touch formlib/color-1.0.0
+        fi
+        if ${{ steps.setup.outputs.forcer }} && [ ! -f formlib/forcer-1.0.0 ]; then
+          rm -rf formlib/forcer*
+          wget https://github.com/benruijl/forcer/archive/v1.0.0.tar.gz -O - | tar -x --gzip
+          mv forcer-1.0.0/forcer.h formlib/
+          mv forcer-1.0.0/forcer formlib/
+          rm -rf forcer-1.0.0
+          touch formlib/forcer-1.0.0
+        fi
+        if ${{ steps.setup.outputs.series }} && [ ! -f formlib/series-1.0.0 ]; then
+          rm -rf formlib/series*
+          wget https://github.com/a-maier/series/releases/download/1.0.0/series.h -P formlib
+          touch formlib/series-1.0.0
+        fi
+
+    # Fix dubious ownership in containers for Git operations.
+    # See: https://github.com/actions/runner/issues/2033#issuecomment-1204205989
+    - name: Fix dubious ownership
+      if: steps.setup.outputs.container == 'true'
+      shell: bash
+      run: |
+        ### Fix dubious ownership
+
+        chown -R $(id -u):$(id -g) $PWD
+
+    - name: Uncompress tarball
+      if: steps.setup.outputs.untar == 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Uncompress tarball ###
+
+        echo "DISTNAME=$(basename form-*.tar.gz .tar.gz)" >>"$GITHUB_ENV"
+
+        tar -xf form-*.tar.gz --strip-components 1
+        rm *.tar.gz
+
+    - name: Run Autoreconf
+      if: steps.setup.outputs.autoreconf == 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Run Autoreconf ###
+
+        autoreconf -i
+
+    - name: Configure
+      if: steps.setup.outputs.configure == 'true'
+      shell: ${{ steps.setup.outputs.msys2 == 'true' && 'msys2 {0}' || 'bash' }}
+      run: |
+        ### Configure ###
+
+        if ! ./configure ${{ steps.setup.outputs.config_args }}; then
+          cat config.log >&2
+          exit 1
+        fi
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 92f85f06..7234647a 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -20,21 +20,20 @@ jobs:
         with:
           fetch-depth: 0  # ensures a reachable tag
 
-      - name: Determine distname
-        run: |
-          echo "distname=form-$(./scripts/git-version-gen.sh -r | sed '2q;d' | sed 's/^v//')" >> $GITHUB_ENV
+      - name: Set up build
+        uses: ./.github/actions/setup-build
 
       - name: Build tarball distribution
         run: |
-          autoreconf -i
-          ./configure --disable-dependency-tracking --disable-scalar --disable-threaded --disable-native --without-gmp --without-zlib
-          make distdir=$distname dist-gzip
+          distname="${{ env.DISTNAME }}"
+          echo "distname=$distname" >>"$GITHUB_ENV"
+          make distdir="$distname" dist-gzip
 
       - name: Print tarball information
         run: |
-          ls -l $distname.tar.gz
-          file $distname.tar.gz
-          tar -tf $distname.tar.gz
+          ls -l "$distname.tar.gz"
+          file "$distname.tar.gz"
+          tar -tf "$distname.tar.gz"
 
       - name: Upload tarball as artifact
         uses: actions/upload-artifact@v4
@@ -53,8 +52,6 @@ jobs:
     defaults:
       run:
         shell: ${{ matrix.shell }} {0}
-    env:
-      FLINT_VERSION: 3.3.0
     strategy:
       fail-fast: false
       matrix:
@@ -77,123 +74,21 @@ jobs:
           - {os: windows-2022, shell: msys2, bin: form}
           - {os: windows-2022, shell: msys2, bin: tform}
     steps:
-      - name: Install dependencies (Ubuntu)
-        if: runner.os == 'Linux'
-        uses: awalsh128/cache-apt-pkgs-action@v1
-        with:
-          packages: libmpfr-dev libzstd-dev
-          # We need to handle a bug that may cause cache key conflicts.
-          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
-          version: ${{ runner.arch }}-1.0
-
-      - name: Install dependencies (Windows)
-        if: runner.os == 'Windows'
-        uses: msys2/setup-msys2@v2
+      - name: Checkout repository
+        uses: actions/checkout@v4
         with:
-          update: true
-          install: >-
-            make
-            mingw-w64-x86_64-gcc
-            mingw-w64-x86_64-gmp
-            mingw-w64-x86_64-mpfr
-            mingw-w64-x86_64-ruby
-            mingw-w64-x86_64-zlib
-
-        # --static fails on macOS but we want to statically link
-        # the brewed gmp. The linker supports neither -Wl,-static nor
-        # -l:libgmp.a to make partial static links possible.
-        # As a workaround, we make a library directory with libgmp.a
-        # but without libgmp.dylib so that the linker has to link libgmp.a.
-        # The same for other libraries.
-        # Note that the Homebrew installation path for Apple Silicon (arm64)
-        # differs from the one on macOS Intel (x86-64).
-      - name: Set up statically linked libraries (macOS)
-        if: runner.os == 'macOS'
-        run: |
-          mkdir static-lib
-          if [ "$RUNNER_ARCH" == "ARM64" ]; then
-            brew_dir=/opt/homebrew
-            # Include directories, not located in the usual places,
-            # must be explicitly appended to the include paths.
-            export CPATH="$brew_dir/opt/gmp/include:$brew_dir/opt/mpfr/include:/opt/homebrew/opt/zstd/include${CPATH:+":$CPATH"}"
-            echo "CPATH=$CPATH" >>"$GITHUB_ENV"
-          else
-            brew_dir=/usr/local
-          fi
-          ln -s $brew_dir/opt/gmp/lib/libgmp.a static-lib/libgmp.a
-          ln -s $brew_dir/opt/mpfr/lib/libmpfr.a static-lib/libmpfr.a
-          ln -s $brew_dir/opt/zstd/lib/libzstd.a static-lib/libzstd.a
-          export LIBRARY_PATH="$(pwd)/static-lib${LIBRARY_PATH:+":$LIBRARY_PATH"}"
-          echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
-
-      - name: Get cache key
-        run: |
-          # See: https://github.com/actions/upload-artifact/issues/231
-          echo "ImageOS=$ImageOS" >>"$GITHUB_ENV"
-          echo "ImageVersion=$ImageVersion" >>"$GITHUB_ENV"
-
-      - name: Cache FLINT
-        id: cache-flint
-        uses: actions/cache@v4
-        with:
-          path: lib/flint
-          # Here, we set a conservative cache key so that the cache is not reused
-          # when the version or environment changes even slightly.
-          key: flint-${{ env.FLINT_VERSION }}-${{ runner.os }}-${{ runner.arch }}-${{ env.ImageOS }}-${{ env.ImageVersion }}
-
-      # Unfortunately, the flint packages lack the static library,
-      # so we need to build it from source.
-      - name: Build FLINT unless cached
-        if: steps.cache-flint.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p build/flint
-          cd build/flint
-          # See: https://github.com/flintlib/flint/issues/2311
-          wget https://github.com/flintlib/flint/releases/download/v$FLINT_VERSION/flint-$FLINT_VERSION.tar.gz
-          tar -xf *.tar.gz
-          rm *.tar.gz
-          cd flint-*
-          ./configure --prefix=$GITHUB_WORKSPACE/lib/flint --enable-static --disable-shared
-          make -j 4
-          # Test temporarily disabled.
-          # See: https://github.com/flintlib/flint/issues/2058
-          # make -j 4 check
-          make install
-
-      - name: Set FLINT paths
-        run: |
-          export CPATH="$(pwd)/lib/flint/include${CPATH:+":$CPATH"}"
-          echo "CPATH=$CPATH" >>"$GITHUB_ENV"
-          export LIBRARY_PATH="$(pwd)/lib/flint/lib${LIBRARY_PATH:+":$LIBRARY_PATH"}"
-          echo "LIBRARY_PATH=$LIBRARY_PATH" >>"$GITHUB_ENV"
+          sparse-checkout: .github/actions
+          sparse-checkout-cone-mode: false
 
       - name: Download tarball
         uses: actions/download-artifact@v4
         with:
           name: src
 
-      - name: Uncompress tarball
-        run: |
-          tar -xf *.tar.gz --strip-components 1
-          rm *.tar.gz
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking --disable-scalar --disable-threaded --disable-native --enable-static-link --with-gmp --with-zlib --with-zstd --with-flint'
-          case ${{ matrix.bin }} in
-            form)  opts="$opts --enable-scalar";;
-            tform) opts="$opts --enable-threaded";;
-          esac
-          if [ "$RUNNER_OS" == "macOS" ]; then
-            opts="$opts --disable-static-link"
-          fi
-          if [ "$RUNNER_OS" == "Windows" ]; then
-            opts="$opts --with-api=windows"
-          fi
-          if ! ./configure $opts; then
-            cat config.log
-            exit 1
-          fi
+      - name: Set up build
+        uses: ./.github/actions/setup-build
+        with:
+          features: ${{ matrix.bin }} ${{ matrix.shell }} deploy
 
       - name: Build
         id: build
@@ -211,24 +106,24 @@ jobs:
         continue-on-error: ${{ runner.os == 'Windows' }}
         run: |
           binname=${{ matrix.bin }}
-          if [ "$RUNNER_OS" == "Windows" ]; then
+          if [ "${{ runner.os }}" == "Windows" ]; then
             binname=$binname.exe
           fi
-          ls -l sources/$binname
-          file sources/$binname
-          if [ "$RUNNER_OS" == "macOS" ]; then
-            otool -L sources/$binname
-            # Check if brewed libraries are statically linked.
-            if otool -L sources/$binname | grep -q '/usr/local/opt'; then
-              echo 'Error: failed to statically link brewed libraries' >&2
+          ls -l "sources/$binname"
+          file "sources/$binname"
+          if [ "${{ runner.os }}" == "macOS" ]; then
+            otool -L "sources/$binname"
+            # Check if brewed/built libraries are statically linked.
+            if otool -L "sources/$binname" | grep -Eq '/usr/local/opt/|/opt/homebrew/opt/|/form/form/lib/'; then
+              echo 'Error: unexpected dependency on shared libraries' >&2
               exit 1
             fi
           fi
-          if [ "$RUNNER_OS" == "Windows" ]; then
-            ldd sources/$binname
-            # Check if MSYS2 DLLs are not linked.
-            if ldd sources/$binname | grep -q 'msys'; then
-              echo 'Error: failed to avoid to link with MSYS2 DLLs' >&2
+          if [ "${{ runner.os }}" == "Windows" ]; then
+            ldd "sources/$binname"
+            # Check if MSYS2/built DLLs are not linked.
+            if ldd "sources/$binname" | grep -Eq 'msys|mingw|/form/form/lib/'; then
+              echo 'Error: unexpected dependency on DLLs' >&2
               exit 1
             fi
           fi
@@ -249,44 +144,33 @@ jobs:
     needs: build-src
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          sparse-checkout: .github/actions
+          sparse-checkout-cone-mode: false
+
       - name: Download tarball
         uses: actions/download-artifact@v4
         with:
           name: src
 
-      - name: Determine distname
-        run: |
-          echo "distname=$(basename *.tar.gz .tar.gz)-manual" >> $GITHUB_ENV
-
-      - name: Uncompress tarball
-        run: |
-          tar -xf *.tar.gz --strip-components 1
-          rm *.tar.gz
-
-      # Currently, cache-apt-pkgs-action doesn't work for LaTeX.
-      # https://github.com/awalsh128/cache-apt-pkgs-action/issues/57
-      # - name: Install LaTeX2HTML
-      #   uses: awalsh128/cache-apt-pkgs-action@v1
-      #   with:
-      #     packages: latex2html  # shares the same cache with build-doc-html
-      #     version: 1.0
-
-      - name: Install dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get -y install texlive-latex-extra
+      - name: Set up build
+        uses: ./.github/actions/setup-build
+        with:
+          features: latex
 
       - name: Build PDF file
         run: |
-          autoreconf -i
-          ./configure --disable-dependency-tracking --disable-scalar --disable-threaded --disable-native --without-gmp --without-zlib
+          distname="${{ env.DISTNAME }}-manual"
+          echo "distname=$distname" >>"$GITHUB_ENV"
           make pdf
-          cp doc/manual/manual.pdf $distname.pdf
+          mv doc/manual/manual.pdf "$distname.pdf"
 
       - name: Print document information
         run: |
-          ls -l $distname.pdf
-          file $distname.pdf
+          ls -l "$distname.pdf"
+          file "$distname.pdf"
 
       - name: Upload document as artifact
         uses: actions/upload-artifact@v4
@@ -302,37 +186,26 @@ jobs:
     needs: build-src
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          sparse-checkout: .github/actions
+          sparse-checkout-cone-mode: false
+
       - name: Download tarball
         uses: actions/download-artifact@v4
         with:
           name: src
 
-      - name: Determine distname
-        run: |
-          echo "distname=$(basename *.tar.gz .tar.gz)-manual-html" >> $GITHUB_ENV
-
-      - name: Uncompress tarball
-        run: |
-          tar -xf *.tar.gz --strip-components 1
-          rm *.tar.gz
-
-      # Currently, cache-apt-pkgs-action doesn't work for LaTeX.
-      # https://github.com/awalsh128/cache-apt-pkgs-action/issues/57
-      # - name: Install LaTeX2HTML
-      #   uses: awalsh128/cache-apt-pkgs-action@v1
-      #   with:
-      #     packages: latex2html  # shares the same cache with build-doc-pdf
-      #     version: 1.0
-
-      - name: Install dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get -y install latex2html
+      - name: Set up build
+        uses: ./.github/actions/setup-build
+        with:
+          features: latex2html
 
       - name: Build HTML files
         run: |
-          autoreconf -i
-          ./configure --disable-dependency-tracking --disable-scalar --disable-threaded --disable-native --without-gmp --without-zlib
+          distname="${{ env.DISTNAME }}-manual-html"
+          echo "distname=$distname" >>"$GITHUB_ENV"
           make -C doc/manual latex2html
           (
             cd doc/manual/manual
@@ -340,7 +213,8 @@ jobs:
             # Print generated files.
             ls -A -C
             # Check if there are no unexpected files.
-            for f in $(ls -A); do
+            shopt -s nullglob
+            for f in * .*; do
               case "$f" in
                 index.html|manual.html|manual.css|img*.svg)
                   ;;
@@ -351,14 +225,14 @@ jobs:
               esac
             done
           )
-          cp -r doc/manual/manual $distname
-          tar -c $distname/* | gzip -c -9 > $distname.tar.gz
+          mv doc/manual/manual "$distname"
+          tar -c "$distname"/* | gzip -c -9 > "$distname.tar.gz"
 
       - name: Print file information
         run: |
-          ls -l $distname.tar.gz
-          file $distname.tar.gz
-          tar -tf $distname.tar.gz
+          ls -l "$distname.tar.gz"
+          file "$distname.tar.gz"
+          tar -tf "$distname.tar.gz"
 
       - name: Upload file as artifact
         uses: actions/upload-artifact@v4
@@ -384,37 +258,34 @@ jobs:
         with:
           path: artifacts
 
-      - name: Determine distname
-        run: |
-          echo "distname=$(basename artifacts/src/*.tar.gz .tar.gz)" >> $GITHUB_ENV
-
       - name: Print all artifacts
         run: ls -l -R artifacts
 
       - name: Prepare distributions
         run: |
+          distname=$(basename artifacts/src/*.tar.gz .tar.gz)
           mkdir dist
-          mv artifacts/src/*.tar.gz dist
-          mv artifacts/doc-html/*.tar.gz dist
-          mv artifacts/doc-pdf/*.pdf dist
+          mv artifacts/src/*.tar.gz dist/
+          mv artifacts/doc-html/*.tar.gz dist/
+          mv artifacts/doc-pdf/*.pdf dist/
           make_tar_gz() {
-            if ls artifacts/$2 >/dev/null 2>&1; then
+            if compgen -G "artifacts/$2" >/dev/null; then
               pkgname=$distname-$1
-              mkdir $pkgname
-              mv artifacts/$2 $pkgname
-              chmod +x $pkgname/*form*
-              tar -c $pkgname/* | gzip -c -9 >dist/$pkgname.tar.gz
-              rm -rf $pkgname
+              mkdir "$pkgname"
+              mv artifacts/$2 "$pkgname"/
+              chmod +x "$pkgname"/*form*
+              tar -c "$pkgname"/* | gzip -c -9 >"dist/$pkgname.tar.gz"
+              rm -rf "$pkgname"
             fi
           }
           make_zip() {
-            if ls artifacts/$2 >/dev/null 2>&1; then
+            if compgen -G "artifacts/$2" >/dev/null; then
               pkgname=$distname-$1
-              mkdir $pkgname
-              mv artifacts/$2 $pkgname
-              chmod +x $pkgname/*form*
-              zip -9 dist/$pkgname.zip $pkgname/*
-              rm -rf $pkgname
+              mkdir "$pkgname"
+              mv artifacts/$2 "$pkgname"/
+              chmod +x "$pkgname"/*form*
+              zip -9 "dist/$pkgname.zip" "$pkgname"/*
+              rm -rf "$pkgname"
             fi
           }
           make_tar_gz x86_64-linux '*-ubuntu-24.04/*form'
@@ -423,13 +294,23 @@ jobs:
           make_tar_gz arm64-osx '*-macos-14/*form'
           make_zip x86_64-windows '*-windows-2022/*form.exe'
 
-      - name: Summarize files for distribution
+      - name: Summarize the distributions
         run: |
-          echo "Number of files: $(ls -1 dist | wc -l)" >> $GITHUB_STEP_SUMMARY
-          echo '' >> $GITHUB_STEP_SUMMARY
-          echo '| File Name | Size (bytes) |' >> $GITHUB_STEP_SUMMARY
-          echo '| --- | ---: |' >> $GITHUB_STEP_SUMMARY
-          ls -l dist | tail -n +2 | awk '{ printf "| %s | %s |\n", $9, $5 }' >> $GITHUB_STEP_SUMMARY
+          expected_count=8
+          actual_count=$(find dist -type f | wc -l)
+
+          {
+            echo "Number of files: $actual_count"
+            echo
+            echo '| File Name | Size (bytes) |'
+            echo '| --- | ---: |'
+            find dist -type f -printf "| %f | %s |\n"
+          } >>"$GITHUB_STEP_SUMMARY"
+
+          if [[ $actual_count -ne $expected_count ]]; then
+            echo "Error: expected $expected_count files, but found $actual_count." >&2
+            exit 1
+          fi
 
       # Upload the distributions as an artifact, regardless of whether
       # the commit has a versioning tag. This makes checking and debugging easy.
@@ -451,7 +332,7 @@ jobs:
       # a versioning tag.
       - name: Publish distributions
         if: startsWith(github.ref, 'refs/tags/v')
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           files: |
             dist/*.tar.gz
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b67ed099..37048a39 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,67 +37,19 @@ jobs:
         with:
           fetch-depth: 0  # ensures a reachable tag
 
-      - name: Install dependencies
-        uses: awalsh128/cache-apt-pkgs-action@v1
+      - name: Set up build
+        uses: ./.github/actions/setup-build
         with:
-          packages: libflint-dev libmpfr-dev libzstd-dev
-          # We need to handle a bug that may cause cache key conflicts.
-          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
-          version: ${{ runner.arch }}-1.0
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking'
-          case ${{ matrix.bin }} in
-            form|vorm)       opts="$opts --enable-scalar --disable-threaded --disable-parform";;
-            tform|tvorm)     opts="$opts --disable-scalar --enable-threaded --disable-parform";;
-          esac
-          case ${{ matrix.bin }} in
-            vorm|tvorm|parvorm) opts="$opts --enable-debug";;
-          esac
-          case "${{ matrix.flint }}" in
-            no) opts="$opts --without-flint";;
-            *)  opts="$opts --with-flint";;
-          esac
-          opts="$opts --with-gmp --with-zlib --with-zstd"
-          autoreconf -i
-          ./configure $opts
+          features: >-
+            ${{ matrix.bin }}
+            ${{ matrix.flint == 'no' && 'noflint' || '' }}
+            ${{ matrix.test == 'extra' && 'formlib' || '' }}
 
       - name: Build
         run: make -C sources -j 4 ${{ matrix.bin }}
 
-      - name: Cache library
-        id: cache-formlib
-        if: contains(fromJson('["extra"]'), matrix.test)
-        uses: actions/cache@v4
-        with:
-          path: formlib
-          key: formlib-${{ matrix.test }}-v2
-
-      - name: Install library if necessary
-        if: steps.cache-formlib.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p formlib
-          case ${{ matrix.test }} in
-            extra)
-              # forcer library for the forcer test in extra
-              wget https://github.com/benruijl/forcer/archive/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv forcer-1.0.0/forcer.h formlib
-              mv forcer-1.0.0/forcer formlib
-              rm -rf forcer-1.0.0
-              # color library for the color test in extra
-              wget https://github.com/form-dev/form-packages/archive/refs/tags/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv form-packages-1.0.0/color/color.h formlib
-              rm -rf form-packages-1.0.0
-              # series library for test in extra
-              wget https://github.com/a-maier/series/releases/download/1.0.0/series.h -P formlib
-              ;;
-          esac
-
       - name: Test
         run: ./check/check.rb ./sources/${{ matrix.bin }} --stat ${{ matrix.nthreads && format('-w{0}', matrix.nthreads) || '' }} ${{ matrix.timeout && format('--timeout {0}', matrix.timeout) || '' }} ${{ matrix.test != 'default' && format('-C {0}', matrix.test) || '' }}
-        env:
-          FORMPATH: ${{ github.workspace }}/formlib
 
   check-parform:
     name: Test (${{ matrix.test }}) for ${{ matrix.bin }}${{ matrix.nthreads && format(' -w{0}', matrix.nthreads) || '' }}${{ matrix.flint && format(' (flint - {0})', matrix.flint) || '' }}
@@ -113,71 +65,19 @@ jobs:
         with:
           fetch-depth: 0  # ensures a reachable tag
 
-      - name: Install dependencies
-        uses: awalsh128/cache-apt-pkgs-action@v1
+      - name: Set up build
+        uses: ./.github/actions/setup-build
         with:
-          packages: libflint-dev libmpfr-dev libzstd-dev
-          # We need to handle a bug that may cause cache key conflicts.
-          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
-          version: ${{ runner.arch }}-1.0
-
-      - name: Install MPI
-        run: |
-          sudo apt update
-          sudo apt install -y -q libopenmpi-dev
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking'
-          case ${{ matrix.bin }} in
-            parform|parvorm) opts="$opts --disable-scalar --disable-threaded --enable-parform";;
-          esac
-          case ${{ matrix.bin }} in
-            vorm|tvorm|parvorm) opts="$opts --enable-debug";;
-          esac
-          case "${{ matrix.flint }}" in
-            no) opts="$opts --without-flint";;
-            *)  opts="$opts --with-flint";;
-          esac
-          opts="$opts --with-gmp --with-zlib --with-zstd"
-          autoreconf -i
-          ./configure $opts
+          features: >-
+            ${{ matrix.bin }}
+            ${{ matrix.flint == 'no' && 'noflint' || '' }}
+            ${{ matrix.test == 'extra' && 'formlib' || '' }}
 
       - name: Build
         run: make -C sources -j 4 ${{ matrix.bin }}
 
-      - name: Cache library
-        id: cache-formlib
-        if: contains(fromJson('["extra"]'), matrix.test)
-        uses: actions/cache@v4
-        with:
-          path: formlib
-          key: formlib-${{ matrix.test }}-v2
-
-      - name: Install library if necessary
-        if: steps.cache-formlib.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p formlib
-          case ${{ matrix.test }} in
-            extra)
-              # forcer library for the forcer test in extra
-              wget https://github.com/benruijl/forcer/archive/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv forcer-1.0.0/forcer.h formlib
-              mv forcer-1.0.0/forcer formlib
-              rm -rf forcer-1.0.0
-              # color library for the color test in extra
-              wget https://github.com/form-dev/form-packages/archive/refs/tags/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv form-packages-1.0.0/color/color.h formlib
-              rm -rf form-packages-1.0.0
-              # series library for test in extra
-              wget https://github.com/a-maier/series/releases/download/1.0.0/series.h -P formlib
-              ;;
-          esac
-
       - name: Test
         run: ./check/check.rb ./sources/${{ matrix.bin }} --stat ${{ matrix.nthreads && format('-w{0}', matrix.nthreads) || '' }} ${{ matrix.timeout && format('--timeout {0}', matrix.timeout) || '' }} ${{ matrix.test != 'default' && format('-C {0}', matrix.test) || '' }}
-        env:
-          FORMPATH: ${{ github.workspace }}/formlib
 
   # Check memory errors (e.g., uninitialized values and memory leaks)
   # thoroughly by using Valgrind on Linux. To maximize the use of concurrent
@@ -224,63 +124,20 @@ jobs:
         with:
           fetch-depth: 0  # ensures a reachable tag
 
-      - name: Install dependencies
-        uses: awalsh128/cache-apt-pkgs-action@v1
+      - name: Set up build
+        uses: ./.github/actions/setup-build
         with:
-          packages: libflint-dev libmpfr-dev libzstd-dev valgrind
-          # We need to handle a bug that may cause cache key conflicts.
-          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
-          version: ${{ runner.arch }}-1.0
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking'
-          case ${{ matrix.bin }} in
-            vorm)    opts="$opts --enable-scalar --disable-threaded --disable-parform";;
-            tvorm)   opts="$opts --disable-scalar --enable-threaded --disable-parform";;
-          esac
-          case ${{ matrix.bin }} in
-            vorm|tvorm|parvorm) opts="$opts --enable-debug";;
-          esac
-          opts="$opts --with-gmp --with-zlib --with-zstd"
-          autoreconf -i
-          ./configure $opts
+          features: >-
+            ${{ matrix.bin }}
+            ${{ matrix.flint == 'no' && 'noflint' || '' }}
+            ${{ matrix.test == 'extra' && 'formlib' || '' }}
+            valgrind
 
       - name: Build
         run: make -C sources -j 4 ${{ matrix.bin }}
 
-      - name: Cache library
-        id: cache-formlib
-        if: contains(fromJson('["extra"]'), matrix.test)
-        uses: actions/cache@v4
-        with:
-          path: formlib
-          key: formlib-${{ matrix.test }}-v2
-
-      - name: Install library if necessary
-        if: steps.cache-formlib.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p formlib
-          case ${{ matrix.test }} in
-            extra)
-              # forcer library for the forcer test in extra
-              wget https://github.com/benruijl/forcer/archive/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv forcer-1.0.0/forcer.h formlib
-              mv forcer-1.0.0/forcer formlib
-              rm -rf forcer-1.0.0
-              # color library for the color test in extra
-              wget https://github.com/form-dev/form-packages/archive/refs/tags/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv form-packages-1.0.0/color/color.h formlib
-              rm -rf form-packages-1.0.0
-              # series library for test in extra
-              wget https://github.com/a-maier/series/releases/download/1.0.0/series.h -P formlib
-              ;;
-          esac
-
       - name: Test
         run: ./check/check.rb valgrind ./sources/${{ matrix.bin }} --stat -g ${{ matrix.group }} --retries 5 ${{ matrix.nthreads && format('-w{0}', matrix.nthreads) || '' }} ${{ matrix.test != 'default' && format('-C {0}', matrix.test) || '' }}
-        env:
-          FORMPATH: ${{ github.workspace }}/formlib
 
   # Generate LCOV coverage data to be posted to coveralls.io. Note that
   # we measure code coverage only for tests checked with Valgrind.
@@ -310,69 +167,25 @@ jobs:
         with:
           fetch-depth: 0  # ensures a reachable tag
 
-      - name: Install dependencies
-        uses: awalsh128/cache-apt-pkgs-action@v1
+      - name: Set up build
+        uses: ./.github/actions/setup-build
         with:
-          packages: lcov libflint-dev libmpfr-dev libzstd-dev
-          # We need to handle a bug that may cause cache key conflicts.
-          # See: https://github.com/awalsh128/cache-apt-pkgs-action/pull/150
-          version: ${{ runner.arch }}-1.0
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking'
-          case ${{ matrix.bin }} in
-            vorm)    opts="$opts --enable-scalar --disable-threaded --disable-parform";;
-            tvorm)   opts="$opts --disable-scalar --enable-threaded --disable-parform";;
-          esac
-          case "${{ matrix.flint }}" in
-            no) opts="$opts --without-flint";;
-            *)  opts="$opts --with-flint";;
-          esac
-          opts="$opts --enable-debug --enable-coverage --with-gmp --with-zlib --with-zstd"
-          autoreconf -i
-          ./configure $opts
+          features: >-
+            ${{ matrix.bin }}
+            ${{ matrix.flint == 'no' && 'noflint' || '' }}
+            ${{ matrix.test == 'extra' && 'formlib' || '' }}
+            coverage
 
       - name: Build
         run: make -C sources -j 4 ${{ matrix.bin }}
 
-      - name: Cache library
-        id: cache-formlib
-        if: contains(fromJson('["extra"]'), matrix.test)
-        uses: actions/cache@v4
-        with:
-          path: formlib
-          key: formlib-${{ matrix.test }}-v2
-
-      - name: Install library if necessary
-        if: steps.cache-formlib.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p formlib
-          case ${{ matrix.test }} in
-            extra)
-              # forcer library for the forcer test in extra
-              wget https://github.com/benruijl/forcer/archive/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv forcer-1.0.0/forcer.h formlib
-              mv forcer-1.0.0/forcer formlib
-              rm -rf forcer-1.0.0
-              # color library for the color test in extra
-              wget https://github.com/form-dev/form-packages/archive/refs/tags/v1.0.0.tar.gz -O - | tar -x --gzip
-              mv form-packages-1.0.0/color/color.h formlib
-              rm -rf form-packages-1.0.0
-              # series library for test in extra
-              wget https://github.com/a-maier/series/releases/download/1.0.0/series.h -P formlib
-              ;;
-          esac
-
       - name: Test
         run: ./check/check.rb ./sources/${{ matrix.bin }} --stat --timeout ${{ matrix.timeout && format('{0}', matrix.timeout) || '30' }} ${{ matrix.nthreads && format('-w{0}', matrix.nthreads) || '' }} ${{ matrix.test != 'default' && format('-C {0}', matrix.test) || '' }} --fake-valgrind
-        env:
-          FORMPATH: ${{ github.workspace }}/formlib
 
       - name: Generate LCOV coverage data
         run: |
           lcov -d . -c -o coverage.lcov
-          lcov -r coverage.lcov */usr/include/* -o coverage.lcov
+          lcov -r coverage.lcov '*/usr/include/*' '*/extern/*'${{ matrix.flint != 'no' && ' ''*/lib/*''' || '' }} -o coverage.lcov
 
       - name: Coveralls Parallel
         uses: coverallsapp/github-action@v2
@@ -409,26 +222,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v1
 
-      - name: Install dependencies
-        run: |
-          apt-get update
-          apt-get -y install automake build-essential git libgmp-dev libmpfr-dev libzstd-dev ruby zlib1g-dev
-
-      # Fix dubious ownership for Git operations.
-      # See https://github.com/actions/runner/issues/2033#issuecomment-1204205989
-      - name: Set ownership
-        run: chown -R $(id -u):$(id -g) $PWD
-
-      - name: Configure
-        run: |
-          opts='--disable-dependency-tracking'
-          case ${{ matrix.bin }} in
-            form)  opts="$opts --enable-scalar --disable-threaded --disable-parform";;
-            tform) opts="$opts --disable-scalar --enable-threaded --disable-parform";;
-          esac
-          opts="$opts --disable-debug --with-gmp --with-zlib --with-zstd --without-flint"
-          autoreconf -i
-          ./configure $opts
+      - name: Set up build
+        uses: ./.github/actions/setup-build
+        with:
+          features: ${{ matrix.bin }} noflint  # actions/cache@v4 doesn't work
 
       - name: Build
         run: make -C sources -j 4 ${{ matrix.bin }}