cc @svanderburg

I understand what this pull request is trying to solve. However, statically binding pkgs.nix as a runtime dependency also has a disadvantage -- it may be possible that the version pkgs.nix resolves to is not necessarily the same version as the Nix package manager that is being used, e.g. you may use an unstable version of Nix in your user profile.

This (in theory) could lead to compatibility issues, because the host system's nix-hash could work in a slightly different way.

I need to give this a bit of thought.

ok, there is another program that uses this approach https://github.com/srghma/nixpkgs/blob/5bb75e17b9dc7cfb3d1bc4751642954485155ae1/pkgs/development/node-packages/default-v6.nix#L55

I have merged it, but maybe in the future we need to think about a better approach.