cleanup

Author: davegarthsimpson

.github/workflows/build.yml

@@ -300,7 +300,7 @@ jobs:
       - name: Create 
         shell: cmd
         if: runner.os == 'Windows' && matrix.config.working-directory
-        run: mkdir "${{ matrix.config.working-directory }}"
+        run: if not exist "${{ matrix.config.working-directory }}" mkdir "${{ matrix.config.working-directory }}"
 
       - name: Checkout
         if: fromJSON(matrix.config.container) == null
@@ -431,6 +431,10 @@ jobs:
         with:
           name: ${{ env.JOB_TRANSFER_ARTIFACT }}
           path: ${{ runner.os == 'Windows' && matrix.config.relative-working-directory && format('{0}/{1}', matrix.config.relative-working-directory, env.BUILD_ARTIFACTS_PATH) || env.BUILD_ARTIFACTS_PATH }}
+      
+      - name: Manual Clean up for self-hosted runners
+        if: runner.os == 'Windows' && matrix.config.working-directory
+        run: rmdir /s /q "${{ matrix.config.working-directory }}"
 
   merge-channel-files:
     needs: