the nixpkgs repo is pretty difficult to fork
For this reason, Tvix (a modular Nix implementation) cites compatibility with nixpkgs as one of their goals:
The package collection is an enormous effort with hundreds of thousands of commits, encoding expert knowledge about lots of different software and ways of building and managing it. It is a very valuable piece of software and we must be able to reuse it.
How does it start with women being more conservative than men in Germany and the US?