# Pastebin 1oh3tW61
unpacking 'https://github.com/NixOS/nixpkgs/archive/ce12576dd0ccbec911cc03d86da9728192c4ba84.tar.gz'...
error: attribute 'hackage-db_2_1_0' missing, at /nix/store/m68djh4ldhaa990imc6n5i0j1z4g2jzp-source/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix:81:18