I can see this version check in master

https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix#L13

and in haskell-updates:

https://github.com/NixOS/nixpkgs/blob/haskell-updates/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix#L13

I can confirm that the newest release 0.20.1 is no longer broken: sol/doctest#383 / https://hackage.haskell.org/package/doctest, so can these checks be removed please?

I'd have PR'd, but I'm not sure everywhere it's referenced and needs update to 0.20.1 at the same time.

Thanks