Fixup CI working

.envrc

@@ -3,4 +3,4 @@ if ! has nix_direnv_version || ! nix_direnv_version 2.3.0; then
   source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.3.0/direnvrc" "sha256-Dmd+j63L84wuzgyjITIfSxSD57Tx7v51DMxVZOsiUD8="
 fi
 # https://github.com/input-output-hk/devx Slightly opinionated shared GitHub Action for Cardano-Haskell projects
-use flake "github:input-output-hk/devx#ghc963-iog"
+use flake "github:input-output-hk/devx#ghc964-iog"

.github/workflows/haskell-ci.yml

@@ -1,6 +1,6 @@
 name: Haskell-CI
 on:
-  - push
+  - pull_request
 jobs:
   tests:
     runs-on: ubuntu-latest
@@ -31,8 +31,8 @@ jobs:
           ~/.cabal/packages
           ~/.cabal/store
           dist-newstyle
-        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('**/*.cabal', '**/cabal.project', '**/cabal.project.freeze') }}
-        restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-
+        key: ${{ runner.os }}-ghc964-${{ hashFiles('**/*.cabal', '**/cabal.project', '**/cabal.project.freeze') }}
+        restore-keys: ${{ runner.os }}-ghc964-
     - name: Cabal build and test
       shell: devx {0}
       run: |
@@ -44,5 +44,5 @@ jobs:
       run: |
         cabal install cabal-fmt
         cabal install fourmolu
-        cabal-fmt --check cem-script.cabal
-        fourmolu .
+        /home/runner/.cabal-devx/bin/cabal-fmt --check cem-script.cabal
+        /home/runner/.cabal-devx/bin/fourmolu .