diff --git a/.gitmodules b/.gitmodules
index 7b8f5ca..546361d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "OpenBLAS"]
 	path = OpenBLAS
 	url = https://github.com/xianyi/OpenBLAS.git
-[submodule "gfortran-install"]
-	path = gfortran-install
-	url = https://github.com/MacPython/gfortran-install.git
diff --git a/gfortran-install b/gfortran-install
deleted file mode 160000
index 3dd38d9..0000000
--- a/gfortran-install
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 3dd38d9ce78b3890598cb0eff18a7bec50c06f5e
diff --git a/pyproject.toml b/pyproject.toml
index c956d4c..eb3981c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "scipy-openblas64"
 # v0.3.30-349-gf6df9beb
-version = "0.3.30.349.0"
+version = "0.3.30.349.1"
 requires-python = ">=3.7"
 description = "Provides OpenBLAS for python packaging"
 readme = "README.md"
diff --git a/tools/build_steps.sh b/tools/build_steps.sh
index 6aacb01..de1017c 100644
--- a/tools/build_steps.sh
+++ b/tools/build_steps.sh
@@ -24,25 +24,20 @@ function get_os {
 
 
 function before_build {
-    # Manylinux Python version set in build_lib
+    if [ ! -e /usr/local/lib ]; then
+        sudo mkdir -p /usr/local/lib
+        sudo chmod 777 /usr/local/lib
+        touch /usr/local/lib/.dir_exists
+    fi
+    if [ ! -e /usr/local/include ]; then
+        sudo mkdir -p /usr/local/include
+        sudo chmod 777 /usr/local/include
+        touch /usr/local/include/.dir_exists
+    fi
     if [ -n "$IS_OSX" ]; then
-        if [ ! -e /usr/local/lib ]; then
-            sudo mkdir -p /usr/local/lib
-            sudo chmod 777 /usr/local/lib
-            touch /usr/local/lib/.dir_exists
-        fi
-        if [ ! -e /usr/local/include ]; then
-            sudo mkdir -p /usr/local/include
-            sudo chmod 777 /usr/local/include
-            touch /usr/local/include/.dir_exists
-        fi
         # get_macpython_environment ${MB_PYTHON_VERSION} venv
         python3.9 -m venv venv
         source venv/bin/activate
-        alias gfortran=gfortran-15
-        # Deployment target set by gfortran_utils
-        echo "Deployment target $MACOSX_DEPLOYMENT_TARGET"
-
         # Build the objconv tool
         (cd ${ROOT_DIR}/objconv && bash ../tools/build_objconv.sh)
     fi
@@ -55,13 +50,9 @@ function clean_code {
     [ -z "$build_commit" ] && echo "build_commit not defined" && exit 1
     pushd OpenBLAS
     git fetch origin --tags
-    echo after git fetch origin
     git checkout $build_commit
-    echo after git checkout $build_commit
     git clean -fxd 
-    echo after git clean
     git submodule update --init --recursive
-    echo after git submodule update
     popd
 }
 
@@ -110,9 +101,9 @@ function build_lib {
     local manylinux=${MB_ML_VER:-1}
     if [ -n "$IS_OSX" ]; then
         # Do build, add gfortran hash to end of name
-        do_build_lib "$plat" "gf_${GFORTRAN_SHA:0:7}" "$interface64" "$nightly"
+        do_build_lib "$plat" "$interface64" "$nightly"
     else
-        do_build_lib "$plat" "" "$interface64" "$nightly"
+        do_build_lib "$plat" "$interface64" "$nightly"
     fi
 }
 
@@ -129,8 +120,6 @@ function do_build_lib {
     # Build openblas lib
     # Input arg
     #     plat - one of i686, x86_64, arm64
-    #     suffix (optional) - suffix for output archive name
-    #                         Suffix added with hyphen prefix
     #     interface64 (optional) - whether to build ILP64 openblas
     #                              with 64_ symbol suffix
     #     nightly (optional) - whether to build for nightlies
@@ -138,9 +127,8 @@ function do_build_lib {
     # Depends on globals
     #     BUILD_PREFIX - install suffix e.g. "/usr/local"
     local plat=$1
-    local suffix=$2
-    local interface64=$3
-    local nightly=$4
+    local interface64=$2
+    local nightly=$3
     case $(get_os)-$plat in
         Linux-x86_64)
             local bitness=64
@@ -150,18 +138,25 @@ function do_build_lib {
         Darwin-x86_64)
             local bitness=64
             local target="CORE2"
-            # Use gfortran-11
-            unalias gfortran
+            # Use gfortran from conda
             # Since install_fortran uses `uname -a` to determine arch,
-            # force the architecture
-            arch -${PLAT} bash -s << EOF
-source ${ROOT_DIR}/gfortran-install/gfortran_utils.sh
-install_gfortran
-EOF
+            # force the architecture when using rosetta
+            unalias gfortran || true
+            arch -${PLAT} bash -s << "            EOF"
+                set -xe
+                source tools/gfortran_utils.sh
+                install_gfortran
+            EOF
+            # re-export these, since we ran in a shell
+            export FC=$(find /opt/gfortran/gfortran-darwin-${PLAT}-native/bin -name "*-gfortran")
+            local libdir=/opt/gfortran/gfortran-darwin-${PLAT}-native/lib
+            export FFLAGS="-L${libdir} -Wl,-rpath,${libdir}"
+
             export DYLD_LIBRARY_PATH=/usr/local/lib:$DYLD_LIBRARY_PATH
             CFLAGS="$CFLAGS -arch x86_64"
             export SDKROOT=${SDKROOT:-$(xcrun --show-sdk-path)}
             local dynamic_list="CORE2 NEHALEM SANDYBRIDGE HASWELL SKYLAKEX"
+            MACOSX_DEPLOYMENT_TARGET="10.9"
             ;;
         *-i686)
             local bitness=32
@@ -178,6 +173,18 @@ EOF
             fi
             ;;
         Darwin-arm64)
+            export FC=gfortran-15
+            which $FC
+            # guess?
+            local libdir=/opt/homebrew/Cellar/gcc/15.2.0/lib/gcc/current
+            if [ ! -e $libdir/libgfortran.a ]; then
+                echo where is libfortran.a?
+                find /opt -name libgfortran.a
+                exit 1
+            fi
+            export FFLAGS="-L${libdir} -Wl,-rpath,${libdir}"
+            export GFORTRAN_LIBDIR=$($FC -print-file-name=libgfortran.dylib | xargs dirname)
+            export LDFLAGS="-L/opt/homebrew/opt/llvm/lib -L$GFORTRAN_LIBDIR"
             local bitness=64
             local target="VORTEX"
             CFLAGS="$CFLAGS -ftrapping-math -mmacos-version-min=11.0"
@@ -187,6 +194,7 @@ EOF
             ;;
         *-s390x)
             local bitness=64
+            local target="ZARCH_GENERIC"
             ;;
         *-ppc64le)
             local bitness=64
@@ -216,7 +224,10 @@ EOF
     git config --global --add safe.directory '*'
     pushd OpenBLAS
     patch_source
+    # force failure when fortran compiler is no detected
+    sed -i.bak -e 's/info OpenBLAS: Detecting fortran compiler failed/error OpenBLAS: Detecting fortran compiler failed/g' Makefile
     echo start building
+
     if [ "$plat" == "loongarch64" ]; then
         # https://github.com/OpenMathLib/OpenBLAS/blob/develop/.github/workflows/loongarch64.yml#L65
         echo -n > utest/test_dsdot.c
@@ -225,14 +236,14 @@ EOF
     fi
     if [ -n "$dynamic_list" ]; then
         CFLAGS="$CFLAGS -fvisibility=protected -Wno-uninitialized" \
-        make BUFFERSIZE=20 DYNAMIC_ARCH=1 QUIET_MAKE=1 \
+        make BUFFERSIZE=20 DYNAMIC_ARCH=1 \
             USE_OPENMP=0 NUM_THREADS=64 \
             DYNAMIC_LIST="$dynamic_list" \
             BINARY="$bitness" $interface_flags \
             TARGET="$target"
     else
         CFLAGS="$CFLAGS -fvisibility=protected -Wno-uninitialized" \
-        make BUFFERSIZE=20 DYNAMIC_ARCH=1 QUIET_MAKE=1 \
+        make BUFFERSIZE=20 DYNAMIC_ARCH=1 \
             USE_OPENMP=0 NUM_THREADS=64 \
             BINARY="$bitness" $interface_flags \
             TARGET="$target"
@@ -246,8 +257,6 @@ EOF
     fi
     mv $BUILD_PREFIX/lib/pkgconfig/openblas*.pc $BUILD_PREFIX/lib/pkgconfig/scipy-openblas.pc
     local plat_tag=$(get_plat_tag $plat)
-    local suff=""
-    [ -n "$suffix" ] && suff="-$suffix"
     if [ "$interface64" = "1" ]; then
         # OpenBLAS does not install the symbol suffixed static library,
         # do it ourselves
@@ -260,7 +269,7 @@ EOF
     rm $BUILD_PREFIX/lib/pkgconfig/scipy-openblas.pc.bak
     fi
 
-    local out_name="openblas${symbolsuffix}-${version}-${plat_tag}${suff}.tar.gz"
+    local out_name="openblas${symbolsuffix}-${version}-${plat_tag}.tar.gz"
     tar zcvf libs/$out_name \
         $BUILD_PREFIX/include/*blas* \
         $BUILD_PREFIX/include/*lapack* \
diff --git a/tools/gfortran_utils.sh b/tools/gfortran_utils.sh
index b7127f5..74ac108 100644
--- a/tools/gfortran_utils.sh
+++ b/tools/gfortran_utils.sh
@@ -16,168 +16,76 @@
 
 # Bash utilities for use with gfortran
 
-ARCHIVE_SDIR="${ARCHIVE_SDIR:-archives}"
-
-GF_UTIL_DIR=$(dirname "${BASH_SOURCE[0]}")
-
-function get_distutils_platform {
-    # Report platform as in form of distutils get_platform.
-    # This is like the platform tag that pip will use.
-    # Modify fat architecture tags on macOS to reflect compiled architecture
-
-    # Deprecate this function once get_distutils_platform_ex is used in all
-    # downstream projects
-    local plat=$1
-    case $plat in
-        i686|x86_64|arm64|universal2|intel|aarch64|s390x|ppc64le) ;;
-        *) echo Did not recognize plat $plat; return 1 ;;
-    esac
-    local uname=${2:-$(uname)}
-    if [ "$uname" != "Darwin" ]; then
-        if [ "$plat" == "intel" ]; then
-            echo plat=intel not allowed for Manylinux
-            return 1
-        fi
-        echo "manylinux1_$plat"
-        return
-    fi
-    # macOS 32-bit arch is i386
-    [ "$plat" == "i686" ] && plat="i386"
-    local target=$(echo $MACOSX_DEPLOYMENT_TARGET | tr .- _)
-    echo "macosx_${target}_${plat}"
-}
-
-function get_distutils_platform_ex {
-    # Report platform as in form of distutils get_platform.
-    # This is like the platform tag that pip will use.
-    # Modify fat architecture tags on macOS to reflect compiled architecture
-    # For non-darwin, report manylinux version
-    local plat=$1
-    local mb_ml_ver=${MB_ML_VER:-1}
-    case $plat in
-        i686|x86_64|arm64|universal2|intel|aarch64|s390x|ppc64le) ;;
-        *) echo Did not recognize plat $plat; return 1 ;;
-    esac
-    local uname=${2:-$(uname)}
-    if [ "$uname" != "Darwin" ]; then
-        if [ "$plat" == "intel" ]; then
-            echo plat=intel not allowed for Manylinux
-            return 1
-        fi
-        echo "manylinux${mb_ml_ver}_${plat}"
-        return
-    fi
-    # macOS 32-bit arch is i386
-    [ "$plat" == "i686" ] && plat="i386"
-    local target=$(echo $MACOSX_DEPLOYMENT_TARGET | tr .- _)
-    echo "macosx_${target}_${plat}"
-}
-
-function get_macosx_target {
-    # Report MACOSX_DEPLOYMENT_TARGET as given by distutils get_platform.
-    python3 -c "import sysconfig as s; print(s.get_config_vars()['MACOSX_DEPLOYMENT_TARGET'])"
-}
-
 function check_gfortran {
     # Check that gfortran exists on the path
-    if [ -z "$(which gfortran)" ]; then
+    if [[ -n "$FC"  && -e "$FC" ]]; then
+        echo using gfortran from FC
+        echo $FC --version
+    elif [ -z "$(which gfortran)" ]; then
         echo Missing gfortran
         exit 1
+    else
+        echo using gfortran on the PATH
+        echo gfortran --version
     fi
 }
 
-function get_gf_lib_for_suf {
-    local suffix=$1
-    local prefix=$2
-    local plat=${3:-$PLAT}
-    local uname=${4:-$(uname)}
-    if [ -z "$prefix" ]; then echo Prefix not defined; exit 1; fi
-    local plat_tag=$(get_distutils_platform_ex $plat $uname)
-    if [ -n "$suffix" ]; then suffix="-$suffix"; fi
-    local fname="$prefix-${plat_tag}${suffix}.tar.gz"
-    local out_fname="${ARCHIVE_SDIR}/$fname"
-    [ -s $out_fname ] || (echo "$out_fname is empty"; exit 24)
-    echo "$out_fname"
-}
-
 if [ "$(uname)" == "Darwin" ]; then
-    mac_target=${MACOSX_DEPLOYMENT_TARGET:-$(get_macosx_target)}
-    export MACOSX_DEPLOYMENT_TARGET=$mac_target
-    # Keep this for now as some builds might depend on this being
-    # available before install_gfortran is called
-    export GFORTRAN_SHA=c469a420d2d003112749dcdcbe3c684eef42127e
-    # Set SDKROOT env variable if not set
-    export SDKROOT=${SDKROOT:-$(xcrun --show-sdk-path)}
 
     function download_and_unpack_gfortran {
-	local arch=$1
-	local type=$2
-        curl -L -O https://github.com/isuruf/gcc/releases/download/gcc-11.3.0-2/gfortran-darwin-${arch}-${type}.tar.gz
-	case ${arch}-${type} in
-	    arm64-native)
-	        export GFORTRAN_SHA=0d5c118e5966d0fb9e7ddb49321f63cac1397ce8
-		;;
-	    arm64-cross)
-		export GFORTRAN_SHA=527232845abc5af21f21ceacc46fb19c190fe804
-		;;
-	    x86_64-native)
-		export GFORTRAN_SHA=c469a420d2d003112749dcdcbe3c684eef42127e
-		;;
-	    x86_64-cross)
-		export GFORTRAN_SHA=107604e57db97a0ae3e7ca7f5dd722959752f0b3
-		;;
-	esac
-        if [[ "$(shasum gfortran-darwin-${arch}-${type}.tar.gz)" != "${GFORTRAN_SHA}  gfortran-darwin-${arch}-${type}.tar.gz" ]]; then
-            echo "shasum mismatch for gfortran-darwin-${arch}-${type}"
+        local arch=$1
+        local type=$2
+        local gccver=gcc-15.2.0
+        case ${arch}-${type} in
+            arm64-native)
+                export GFORTRAN_SHA=999a91eef894d32f99e3b641520bef9f475055067f301f0f1947b8b716b5922a
+            ;;
+            arm64-cross)
+                export GFORTRAN_SHA=39ef2590629c2f238f1a67469fa429d8d6362425b277abb57fd2f3c982568a3f
+            ;;
+            x86_64-native)
+                #override gccver
+                gccver=gcc-11.3.0-2
+                export GFORTRAN_SHA=981367dd0ad4335613e91bbee453d60b6669f5d7e976d18c7bdb7f1966f26ae4
+            ;;
+            x86_64-cross)
+                export GFORTRAN_SHA=0a19ca91019a75501e504eed1cad2be6ea92ba457ec815beb0dd28652eb0ce3f
+            ;;
+            *) echo Did not recognize arch-plat $arch-$plat; return 1 ;;
+        esac
+        curl -L -O https://github.com/isuruf/gcc/releases/download/${gccver}/gfortran-darwin-${arch}-${type}.tar.gz
+        ls -lh gfortran-darwin-${arch}-${type}.tar.gz
+        local filesha=$(python3 tools/sha256sum.py gfortran-darwin-${arch}-${type}.tar.gz)
+        if [[ "$filesha" != "${GFORTRAN_SHA}" ]]; then
+            echo shasum mismatch for ${gccver}/gfortran-darwin-${arch}-${type}
+            echo expected $GFORTRAN_SHA
+            echo got      $filesha
             exit 1
         fi
-        sudo mkdir -p /opt/
-        sudo cp "gfortran-darwin-${arch}-${type}.tar.gz" /opt/gfortran-darwin-${arch}-${type}.tar.gz
-        pushd /opt
-            sudo tar -xvf gfortran-darwin-${arch}-${type}.tar.gz
-            sudo rm gfortran-darwin-${arch}-${type}.tar.gz
+        if [[ ! -e /opt/gfortran ]]; then
+            sudo mkdir -p /opt/gfortran
+            sudo chmod 777 /opt/gfortran
+        fi
+        cp "gfortran-darwin-${arch}-${type}.tar.gz" /opt/gfortran/gfortran-darwin-${arch}-${type}.tar.gz
+        pushd /opt/gfortran
+        tar -xvf gfortran-darwin-${arch}-${type}.tar.gz
+        rm gfortran-darwin-${arch}-${type}.tar.gz
         popd
-	if [[ "${type}" == "native" ]]; then
-	    # Link these into /usr/local so that there's no need to add rpath or -L
-	    for f in libgfortran.dylib libgfortran.5.dylib libgcc_s.1.dylib libgcc_s.1.1.dylib libquadmath.dylib libquadmath.0.dylib; do
-                ln -sf /opt/gfortran-darwin-${arch}-${type}/lib/$f /usr/local/lib/$f
-            done
-	    # Add it to PATH
-	    ln -sf /opt/gfortran-darwin-${arch}-${type}/bin/gfortran /usr/local/bin/gfortran
-	fi
-    }
-
-    function install_arm64_cross_gfortran {
-	download_and_unpack_gfortran arm64 cross
-        export FC_ARM64="$(find /opt/gfortran-darwin-arm64-cross/bin -name "*-gfortran")"
-        local libgfortran="$(find /opt/gfortran-darwin-arm64-cross/lib -name libgfortran.dylib)"
+        export FC="$(find /opt/gfortran/gfortran-darwin-${arch}-${type}/bin -name "*-gfortran")"
+        local libgfortran="$(find /opt/gfortran/gfortran-darwin-${arch}-${type}/lib -name libgfortran.dylib)"
         local libdir=$(dirname $libgfortran)
-
-        export FC_ARM64_LDFLAGS="-L$libdir -Wl,-rpath,$libdir"
-        if [[ "${PLAT:-}" == "arm64" ]]; then
-            export FC=$FC_ARM64
-        fi
+        export FFLAGS="-L$libdir -Wl,-rpath,$libdir"
     }
+
     function install_gfortran {
         download_and_unpack_gfortran $(uname -m) native
         check_gfortran
-        if [[ "${PLAT:-}" == "universal2" || "${PLAT:-}" == "arm64" ]]; then
-            install_arm64_cross_gfortran
-        fi
     }
 
-    function get_gf_lib {
-        # Get lib with gfortran suffix
-        get_gf_lib_for_suf "gf_${GFORTRAN_SHA:0:7}" $@
-    }
 else
     function install_gfortran {
         # No-op - already installed on manylinux image
         check_gfortran
     }
 
-    function get_gf_lib {
-        # Get library with no suffix
-        get_gf_lib_for_suf "" $@
-    }
 fi
diff --git a/tools/local_build.sh b/tools/local_build.sh
index 4754c2c..a436b26 100755
--- a/tools/local_build.sh
+++ b/tools/local_build.sh
@@ -5,8 +5,12 @@ set -e
 
 # Set extra env
 if [[ $(uname) == "Darwin" ]]; then
-    # Force x86_64
-    export PLAT=x86_64
+    # export PLAT=x86_64
+    export PLAT=arm64
+    # Force installation of gfortran
+    export IS_MACOS=1
+    export IS_OSX=1
+
 elif [[ $(uname -m) == "x86_64" ]]; then
     echo got x86_64
     export PLAT=x86_64
diff --git a/tools/sha256sum.py b/tools/sha256sum.py
new file mode 100755
index 0000000..da39d6e
--- /dev/null
+++ b/tools/sha256sum.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+import hashlib
+import sys
+ 
+filename = sys.argv[1]
+sha256_hash = hashlib.sha256()
+with open(filename,"rb") as f:
+    # Read and update hash string value in blocks
+    for byte_block in iter(lambda: f.read(32768),b""):
+        sha256_hash.update(byte_block)
+    print(sha256_hash.hexdigest())
+