Prefix with pkgs

Author: dmjio

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
        run: nix-channel --update
 
      - name: Cabal install
-       run: nix-env -iA cabal-install -f .
+       run: nix-env -iA pkgs.cabal-install -f .
 
      - name: Cabal update
        run: cabal update