Thank you for updating the pull request!

@LnL7 has deleted such attributes from all packages in #26797, and we won't reintroduce them without a reason. If you want to install one, you can use either beam.interpreters.erlangR20_odbc or (erlangR20.override { odbcSupport = true; }).

In order to merge this, there has to be one commit with the right message. You can edit the commits in the push request with git rebase -i master and then git push -f.

Ahh ok, I think there are a few documentation updates that I could update for this: nixpkgs/doc/languages-frameworks/beam.xml - https://nixos.org/nixpkgs/manual/#how-to-install-beam-packages

nix-env -f "<nixpkgs>" -qaP -A beamPackages doesn't work for me this works though: nix-env -f "<nixpkgs>" -qaP -A beam.interpreters

Should I try to update these too?

If you mean that the documentation does not mention that erlang is available with ODBC or without X and how to install them, then please update it. Otherwise it seems up to date. (It has been updated in #26668.)

beam.interpreters and beam.packages.erlang (aka beamPackages) are two different sets of packages. It seems that nix-env -f "<nixpkgs>" -qaP -A beamPackages must have been failing with error: hex-packages.nix:1550:9 called without required argument ‘redix_0_3_6’ since #16122. This is quite unfortunate. @gleber, could you help fix this?

beamPackages unfortunately rotted over time, since hex2nix mechanism is so hard to operate currently.

Plan to fix this is in #11748 and this issue has been reported in #26279. The only thing I can do quickly is drop most of beamPackages, since AFAIK they are not currently used by anyone.

Thank you, I'm deleting transitively unbuildable packages in #31383.