Fix quick jobs

Author: hasufell

.github/workflows/quick-jobs.yml

@@ -24,12 +24,10 @@ jobs:
     runs-on: ubuntu-18.04
     # This job is not run in a container, any recent GHC should be fine
     steps:
-      - name: Set PATH
-        # https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#adding-a-system-path
+      - name: Install GHC
         run: |
           echo "$HOME/.cabal/bin" >> $GITHUB_PATH
-          echo "/opt/cabal/3.2/bin" >> $GITHUB_PATH
-          echo "/opt/ghc/8.10.4/bin" >> $GITHUB_PATH
+          ghcup install ghc --set 8.10.4
       - uses: actions/cache@v1
         with:
           path: ~/.cabal/store

boot/ci-quick-jobs.template.yml

@@ -24,12 +24,10 @@ jobs:
     runs-on: ubuntu-18.04
     # This job is not run in a container, any recent GHC should be fine
     steps:
-      - name: Set PATH
-        # https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#adding-a-system-path
+      - name: Install GHC
         run: |
           echo "$HOME/.cabal/bin" >> $GITHUB_PATH
-          echo "/opt/cabal/3.2/bin" >> $GITHUB_PATH
-          echo "/opt/ghc/8.10.4/bin" >> $GITHUB_PATH
+          ghcup install ghc --set 8.10.4
       - uses: actions/cache@v1
         with:
           path: ~/.cabal/store