Workaround for GHC 8.10.5 on macOS

Author: konn

.github/workflows/build.yml

@@ -27,8 +27,6 @@ jobs:
             ghc: '8.8.3' # fails due to segfault
           - os: windows-latest
             ghc: '8.8.2' # fails due to error with Cabal
-          - os: macOS-latest
-            ghc: '8.10.5' # https://gitlab.haskell.org/ghc/ghc/-/issues/19968
         include:
           - os: windows-latest
             ghc: '8.10.2.2' # only available for windows and choco
@@ -74,6 +72,14 @@ jobs:
       run: |
         echo "GHC_VERSION=$GHC_VER" >> $GITHUB_ENV
 
+    - name: Tentative Workaround for GHC 8.10.5 on macOS
+      if: matrix.os == 'macOS-latest' && matrix.ghc == '8.10.5'
+      env:
+        GHC_VER: ${{ matrix.ghc }}
+      run: |
+        echo "# uninstalling CommandLineTools (see https://github.com/haskell/haskell-language-server/issues/1913#issuecomment-861667786)"
+        sudo rm -rf /Library/Developer/CommandLineTools
+
     - name: Build Server
       # Try building it twice in case of flakey builds on Windows
       run: |