anchor.diff:    pname = "inspect";
     version = "3.1.1-0";
     knownRockspec = (fetchurl {
  -    url    = "https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/inspect-3.1.1-0.rockspec";
  +    url    = "https://luarocks.org/inspect-3.1.1-0.rockspec";
       sha256 = "00spibq2h4an8v0204vr1hny4vv6za720c37ipsahpjk198ayf1p";
     }).outPath;
     src = fetchurl {
  
positive.code: 
    src = fetchgit ( removeAttrs (builtins.fromJSON ''{
    "url": "https://github.com/astoff/digestif",
    "rev": "3a9076f76d8121526adcdbb9303d04dd3c721a34",
    "date": "2021-06-24T16:18:41+02:00",
    "path": "/nix/store/alzrvcxdmdfqqmm0diaxfljyr3jz1zk3-digestif",
    "sha256": "110vsqyyp2pvn6nk492a9r56iyzymy0w1f2hvx26pv5x01mxm20x",
    "fetchSubmodules": true,
    "deepClone": false,
    "leaveDotGit": false
  
negative.code:   "date": "2017-10-07T08:26:37-07:00",
    "path": "/nix/store/6hjfczd3xkilkdxidgqzdrwmaiwnlf05-lua-zlib",
    "sha256": "1cv12s5c5lihmf3hb0rz05qf13yihy1bjpb7448v8mkiss6y1s5c",
    "fetchLFS": false,
    "fetchSubmodules": true,
    "deepClone": false,
    "leaveDotGit": false
  