fixup! fixup! Put GHC and Cabal into path in integration script.

.github/workflows/haskell-ci.yml

@@ -161,6 +161,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --write-ghc-environment-files=always
       - name: tests
         run: |
+          cd "$PKGDIR_cabal_prettify"
           $CABAL run $ARG_COMPILER $ARG_TESTS $ARG_BENCH examples -- --catch-stderr
       - name: haddock
         run: |