[Nix-dev] Help with ghc errors after nix-channel --update

[Peter Simons]

Hi Benno,

 > I think the problem occurs because in recent nixpkgs hashable was
 > upgraded, but hashable is a GHC core package and thus cannot be
 > replaced.

hashable is a core library? In which versions of GHC is that so?

Best regards,
Peter