try this

Author: k0ekk0ek

.github/workflows/build-test.yml

@@ -64,7 +64,6 @@ jobs:
           update: false
           release: false
           install: make gcc base-devel autotools autoconf-wrapper
-          location: C:\msys64\
       - name: 'Workaround for actions/runner-images#9491'
         if: runner.os == 'Linux'
         run: sudo sysctl vm.mmap_rnd_bits=28
@@ -121,6 +120,10 @@ jobs:
           cd build
           ctest -j 4 --output-on-failure -T test -C ${BUILD_TYPE:-RelWithDebInfo}
           ZONE_KERNEL=fallback ctest -j 4 --output-on-failure -T test -C ${BUILD_TYPE:-RelWithDebInfo}
+      - name: Put MSYS2_MinGW64 on PATH
+        if: runner.os == 'Windows' && matrix.generator == 'MinGW Makefiles'
+        # there is not yet an environment variable for this path from msys2/setup-msys2
+        run: echo "${{ runner.temp }}/msys64/mingw64/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
       - name: 'Build simdzone with configure + make'
         if: runner.os != 'Windows' || matrix.generator == 'MinGW Makefiles'
         id: test_autoconf