diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f743e28cb0f..ecbad22fb15 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -112,24 +112,16 @@ jobs:
         with:
           arch: x64
 
-      - name: Compile and Install GMT (Windows)
+      - name: Compile GMT (Windows)
         if: runner.os == 'Windows'
         shell: cmd
         run: |
           mkdir build
           cd build
-          setlocal enabledelayedexpansion
-          set "INSTALLDIR=%INSTALLDIR:\=/%"
-          set "WINVCPKGROOT=%VCPKG_INSTALLATION_ROOT:/=\%"
-          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=!WINVCPKGROOT!\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
+          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=%VCPKG_INSTALLATION_ROOT%\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
           cmake --build .
-          cmake --build . --target install
-          set "WININSTALLDIR=!INSTALLDIR:/=\!"
-          echo !WININSTALLDIR!\bin>> %GITHUB_PATH%
-          endlocal
 
-      - name: Install GMT (Linux/macOS)
-        if: runner.os != 'Windows'
+      - name: Install GMT
         run: |
           cd build
           cmake --build . --target install
@@ -145,9 +137,7 @@ jobs:
 
       - name: Check a few simple commands
         shell: bash
-        run: |
-          export PATH="$INSTALLDIR/bin:$PATH"
-          bash ci/simple-gmt-tests.sh
+        run: bash ci/simple-gmt-tests.sh
 
       - name: Check a few simple commands (Windows)
         shell: cmd
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index afa3e7d46ed..4c80dfa91a4 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -122,21 +122,14 @@ jobs:
         with:
           arch: x64
 
-      - name: Compile and Install GMT (Windows)
+      - name: Compile GMT (Windows)
         if: runner.os == 'Windows'
         shell: cmd
         run: |
           mkdir build
           cd build
-          setlocal enabledelayedexpansion
-          set "INSTALLDIR=%INSTALLDIR:\=/%"
-          set "WINVCPKGROOT=%VCPKG_INSTALLATION_ROOT:/=\%"
-          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=!WINVCPKGROOT!\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
+          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=%VCPKG_INSTALLATION_ROOT%\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
           cmake --build .
-          cmake --build . --target install
-          set "WININSTALLDIR=!INSTALLDIR:/=\!"
-          echo !WININSTALLDIR!\bin>> %GITHUB_PATH%
-          endlocal
 
       - name: Build documentation
         run: |
@@ -154,8 +147,7 @@ jobs:
           # See https://github.com/GenericMappingTools/gmt/issues/7253
           grep -v 'WARNING: duplicate label -' doc/rst/html.log
 
-      - name: Install GMT (Linux/macOS)
-        if: runner.os != 'Windows'
+      - name: Install GMT
         run: |
           cd build
           cmake --build . --target install
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index bae1aa07ab6..24e97fa821d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -118,21 +118,14 @@ jobs:
         with:
           arch: x64
 
-      - name: Compile and Install GMT (Windows)
+      - name: Compile GMT (Windows)
         if: runner.os == 'Windows'
         shell: cmd
         run: |
           mkdir build
           cd build
-          setlocal enabledelayedexpansion
-          set "INSTALLDIR=%INSTALLDIR:\=/%"
-          set "WINVCPKGROOT=%VCPKG_INSTALLATION_ROOT:/=\%"
-          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=!WINVCPKGROOT!\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
+          cmake -G Ninja .. -DCMAKE_TOOLCHAIN_FILE=%VCPKG_INSTALLATION_ROOT%\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE=Release
           cmake --build .
-          cmake --build . --target install
-          set "WININSTALLDIR=!INSTALLDIR:/=\!"
-          echo !WININSTALLDIR!\bin>> %GITHUB_PATH%
-          endlocal
 
       - name: Pull baseline image data from dvc remote
         id: dvc-pull
@@ -152,8 +145,7 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
 
-      - name: Install GMT (Linux/macOS)
-        if: runner.os != 'Windows'
+      - name: Install GMT
         run: |
           cd build
           cmake --build . --target install
diff --git a/cmake/modules/ConfigCMake.cmake b/cmake/modules/ConfigCMake.cmake
index 460efc038e5..972ee264640 100644
--- a/cmake/modules/ConfigCMake.cmake
+++ b/cmake/modules/ConfigCMake.cmake
@@ -51,6 +51,11 @@ endif (EXISTS "${CMAKE_BINARY_DIR}/cmake/ConfigUserAdvanced.cmake")
 # Do any needed processing of the configuration variables #
 ###########################################################
 
+# Normalize the installation prefix on Windows (avoid mixing slashes and backslashes).
+if (WIN32)
+	file (TO_CMAKE_PATH "${CMAKE_INSTALL_PREFIX}" CMAKE_INSTALL_PREFIX)
+endif (WIN32)
+
 # Set default build type to 'Release'
 if (NOT CMAKE_BUILD_TYPE)
 	set (CMAKE_BUILD_TYPE Release)