[takeda]

I hope that helps with nixpkgs repo as this takes a lot of time whenever it is updated.

[hamandcheese]

I don't think it will. There isn't any good way to incrementally fetch remote nix files, so to use nixpkgs it all has to be downloaded and unpacked.

[hamandcheese]

Unless you mean when developing on the nixpkgs repo, in which case it could help.