nixpkgs.nix

# Nixpkgs, 18 Jul 2019
builtins.fetchTarball {
  url = "https://github.com/NixOS/nixpkgs/archive/00ef72610c82dd0ea69f2bc3f70445483acca0d0.tar.gz";
  sha256 = "0i4kqf5hx7zgd1cf2sj2zaalf7rmd246l664r2wc26w56ya5z1nv";
}