Document builtin functions as well?

[archseer]

Was hoping to use this to look up functions while writing Nix code but it doesn't output anything:

$ manix lib.listToAttrs
Building Home Manager Options cache...
Building NixOS Options cache...
Building Nixpkgs Tree cache...
Building Nixpkgs Documentation cache...
Here's what I found in nixpkgs: lib.listToAttrs

[mrcjkb]

There's also this, which might be useful...