investigating slow builds

.github/workflows/ci.yaml

@@ -50,21 +50,29 @@ jobs:
         echo "home=$HOME" >> $GITHUB_ENV
         echo "ghc=`ghc --version --help | cut -d' ' -f8`" >> $GITHUB_ENV
     - name: Cache cabal files
+      id: cache-cabal
       uses: actions/cache@v3
       with:
         path: ${{env.home}}/.cabal/store/ghc-${{ env.ghc }}
         # Prefer previous ref
         key: build-cabal-${{ env.ghc }}-${{ github.ref }}
         # otherwise just use most recent build.
         restore-keys: build-cabal-${{ env.ghc }}
+    - name: Check for cabal cache hit
+      run: echo "Cache hit on cabal files!"
+      if: steps.cache-cabal.outputs.cache-hit == 'true'
     - name: Cache local build files
+      id: cache-dist-newstyle
       uses: actions/cache@v3
       with:
         path: dist-newstyle
         # Prefer previous ref
         key: build-dist-${{ env.ghc }}-${{ github.ref }}
         # otherwise just use most recent build.
         restore-keys: build-dist-${{ env.ghc }}
+    - name: Check for dist-newstyle cache hit
+      run: echo "Cache hit on dist-newstyle files!"
+      if: steps.cache-dist-newstyle.outputs.cache-hit == 'true'
     - name: Cabal freeze and enable werror.
       run: |
         ln -s cabal.project.freeze.ghc.${{ env.ghc }} cabal.project.freeze

containers/dev/Dockerfile

@@ -10,9 +10,9 @@ ENV PATH=/opt/rh/devtoolset-8/root/bin:${PATH}
 
 # Install GHCUP
 ENV PATH=/root/.ghcup/bin:${PATH}
-ARG ghcupVer=0.1.19.0
-ARG cabalVer=3.4.0.0
-ARG ghcVer=8.10.7
+ARG ghcupVer=0.1.19.5
+ARG cabalVer=3.10.1.0
+ARG ghcVer=9.2.8
 
 RUN mkdir -p /root/.ghcup/bin
 RUN  curl -o /root/.ghcup/bin/ghcup https://downloads.haskell.org/~ghcup/${ghcupVer}/x86_64-linux-ghcup-${ghcupVer} \