try cygpath

Author: sdcb

.github/workflows/test-opencvsharp.yml

@@ -66,7 +66,8 @@ jobs:
         if [[ "${{ matrix.os }}" == osx* ]]; then
           export DYLD_LIBRARY_PATH=${{ github.workspace }}/opencvsharp/lib:$DYLD_LIBRARY_PATH
         elif [[ "${{ matrix.os }}" == win* ]]; then
-          export PATH=${{ github.workspace }}/opencvsharp/lib:$PATH
+          export PATH="$(cygpath -u "${{ github.workspace }}/opencvsharp/lib")":$PATH
+          echo "PATH=$PATH"
         else
           export LD_LIBRARY_PATH=${{ github.workspace }}/opencvsharp/lib:$LD_LIBRARY_PATH
         fi