# Get the sha256 with: nix-prefetch-url --unpack ${url}
{
  url = "https://github.com/NixOS/nixpkgs/archive/da81531c1d76b4c24b944f6cf69b7025770662c1.tar.gz";
  sha256 = "00qqchbvvbcmmkfpjkp1ki4kwcm33ch1ljbi2n3zxy36r430way1";
}