The hackage-db repository has been merged into its new home, the cabal2nix monorepo. Issues and Pull-Requests for hackage-db are handled there as well.
You can still view the master branch prior to merging here.
NixOS/hackage-db
provide access to the Hackage database via Data.Map | Source has moved to https://github.com/nixos/cabal2nix
HaskellNOASSERTION