nixpkgs.json

{
  "url": "https://releases.nixos.org/nixpkgs/nixpkgs-19.03pre165281.7d864c6bd63/nixexprs.tar.xz",
  "sha256": "1wn002mjmpgq47418rkw8fshnmm7xx3r956bblfpnd3id44zak4g"
}