build-failure-repro/nixpkgs.json

{
  "url": "http://github.com/NixOS/nixpkgs",
  "rev": "4d5837fc0897f2e8065ad7cf78846ff8a7b8d1dd",
  "date": "2017-12-27T09:10:34+08:00",
  "sha256": "1a693flzq857ahhz48ks03y0ylnspc79x5pbnirc6rh2gblyx5q3",
  "fetchSubmodules": true
}