Use PowerShell to build the environment variable

Author: wravery

.github/workflows/windows.yml

@@ -45,7 +45,10 @@ jobs:
         $vcpkgTriplet = '${{ steps.set-variables.outputs.vcpkg_triplet }}'
         $cmakeSharedLibs = $(if ('${{ matrix.libs }}' -eq 'shared') { 'ON' } else { 'OFF' })
         $msbuildArch = $(if ('${{ matrix.arch }}' -eq 'x64') { 'X64' } else { 'Win32' })
-        $env:VCPKG_BINARY_SOURCES = "clear;files,${{ steps.configure-build.working-directory }}/vcpkg_cache/,$(if ${{ steps.cache-vcpkg.outputs.cache-hit }} { 'r' } else { 'rw' })"
+
+        $cachedBinaries = Join-Path $(Get-Location) './vcpkg_cache/' -Resolve
+        $cacheAccess = $(if ${{ steps.cache-vcpkg.outputs.cache-hit }} { 'r' } else { 'rw' })
+        $env:VCPKG_BINARY_SOURCES = "clear;files,$cachedBinaries,$cacheAccess"
 
         cmake "-DCMAKE_TOOLCHAIN_FILE=$vcpkgToolchain" "-DVCPKG_TARGET_TRIPLET=$vcpkgTriplet" "-DBUILD_SHARED_LIBS=$cmakeSharedLibs" -G "Visual Studio 17 2022" -A "$msbuildArch" ${{ github.workspace }}