Add ~dblsaiko/nix-extras

[2xsaiko]

This adds https://git.sr.ht/~dblsaiko/nix-extras to the index, it's a collection of packages and NixOS modules that I use in my configurations but which are also ready to be used in others'.

[raboof]

Seems to fail with:

              … while evaluating the module argument `pkgs' in "/nix/store/2pnmvlid82hrccm9qz4qxg8isjlw847n-source/common/modules/programs/kakoune":
      
             error: attribute 'pkgs' missing
             at /nix/store/8rv7qar60c9p7hzwfa02syvl4yzrgmsm-source/lib/modules.nix:554:28:
                553|         addErrorContext (context name)
                554|           (args.${name} or config._module.args.${name})
                   |                            ^
                555|       ) (functionArgs f);

we've seen this in #824 as well. Feel free to open an issue if you think it's a problem in flake-info.

[2xsaiko]

Yeah, this seems like a bug in flake-info. Looks like the pkgs argument isn't being passed to the module loader for some reason. That module (kakoune) is fine, I use it myself.

[2xsaiko]

Looking at it more closely, I believe this is related to usage of pkgs.formats.*, see the issue description.

[raboof]

let's close this for now until someone has fixed #902 then