.github/workflows/haskell.yml Modified

@@ -13,14 +13,19 @@
 
     steps:
     - uses: actions/checkout@v1
+
+      # See https://github.com/mstksg/setup-stack/issues/13
+    - name: 'GitHub actions env workaround'
+      run: 'echo "ACTIONS_ALLOW_UNSECURE_COMMANDS=true" >> $GITHUB_ENV'
     - uses: mstksg/setup-stack@v2
+
     - uses: actions/cache@v1
       env:
         cache-name: cache-stack-modules
       with:
         path: /home/runner/.stack/
         key: ${{ hashFiles('**/stack.yaml.lock') }}
-      
+
     - name: Build
       run: |
         stack build