@cdepillabout hope you can chime in. I came back to nixpkgs thanks to your comment here: Nix Haskell Development (2020) - #27 by NixZeus_2 I feel, after reading your comment, that haskell.nix would be overkill for me and I prefer to just be in nixpkgs.
But now we have flakes.
It’s a bit sad to be in the dark, just copying/pasting things without solid understanding of anything. At least the copying/pasting worked in the pre-flakes world.