anchor.diff:    pname = "lrexlib-posix";
     version = "2.9.1-1";
     knownRockspec = (fetchurl {
  -    url    = "https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/lrexlib-posix-2.9.1-1.rockspec";
  +    url    = "https://luafr.org/luarocks/lrexlib-posix-2.9.1-1.rockspec";
       sha256 = "1zxrx9yifm9ry4wbjgv86rlvq3ff6qivldvib3ha4767azla0j0r";
     }).outPath;
     src = fetchgit ( removeAttrs (builtins.fromJSON ''{
  
positive.code:   "date": "2015-01-15T16:54:10+01:00",
    "path": "/nix/store/n7gb0z26sl7dzdyy3bx1y3cz3npsna7d-lua-luaepnf",
    "sha256": "1lvsi3fklhvz671jgg0iqn0xbkzn9qjcbf2ks41xxjz3lapjr6c9",
    "fetchSubmodules": true,
    "deepClone": false,
    "leaveDotGit": false
  
negative.code: 
  luv = buildLuarocksPackage {
    pname = "luv";
    version = "1.42.0-0";
    knownRockspec = (fetchurl {
      url    = "https://luarocks.org/luv-1.42.0-0.rockspec";
      sha256 = "0pr2gjjnm60w0csb0dacrjalan7ifsfw4lki4ykxx1f4m5snam09";
    }).outPath;
    src = fetchurl {
      url    = "https://github.com/luvit/luv/releases/download/1.42.0-0/luv-1.42.0-0.tar.gz";
      sha256 = "0dkzjkkm0h516ag6sfz5iji761y9slrcfw325f39zkda1sfql8mm";
    };
  
    disabled = (luaOlder "5.1");
  