Run test in powershell

.github/workflows/ci.yml

@@ -42,25 +42,31 @@ jobs:
     # https://github.com/haskell/actions/issues/36
     # We also use --enable-tests and --enable-benchmarks to avoid
     # test and bench commands from reconfiguring and thus rebuilding.
-    - name: Test
+    - name: Build Test
 
       run: |
+        cabal user-config diff
         echo $PATH
 
         cabal sdist -z -o .
         cabal get bytestring-*.tar.gz
         cd bytestring-*/
         bld() { cabal build bytestring:tests --enable-tests --enable-benchmarks; }
         bld || bld || bld
+        
+    - name: Run Test (windows)
+      run: |
+        $bin = cabal list-bin bytestring-tests
+        $env:PATH = ''
+        & "$bin"
+      shell: pwsh
+      if: matrix.os == 'windows-latest'
 
-        rm_dir=/mingw64/bin
-        PATH=:$PATH:
-        PATH=${PATH//:$rm_dir:/:}
-        PATH=${PATH#:}
-        export PATH=${PATH%:}
-        echo $PATH
-
+    - name: Run Test (non-windows)
+      run: |
         $(cabal list-bin bytestring-tests)
+      if: matrix.os != 'windows-latest'
+
     - name: Bench
       run: |
         cd bytestring-*/