anchor.diff:    pname = "stdlib";
     version = "41.2.2-1";
     knownRockspec = (fetchurl {
  -    url    = "https://luarocks.org/stdlib-41.2.2-1.rockspec";
  +    url    = "mirror://luarocks/stdlib-41.2.2-1.rockspec";
       sha256 = "0rscb4cm8s8bb8fk8rknc269y7bjqpslspsaxgs91i8bvabja6f6";
     }).outPath;
     src = fetchurl {
  
positive.code: }:
  buildLuarocksPackage {
    pname = "lua-zlib";
    version = "1.2-1";
    knownRockspec = (fetchurl {
      url    = "https://luarocks.org/lua-zlib-1.2-1.rockspec";
      sha256 = "18rpbg9b4vsnh3svapiqrvwwshw1abb5l5fd7441byx1nm3fjq9w";
    }).outPath;
    src = fetchgit ( removeAttrs (builtins.fromJSON ''{
    "url": "https://github.com/brimworks/lua-zlib.git",
  
negative.code:   pname = "alt-getopt";
    version = "0.8.0-1";
    knownRockspec = (fetchurl {
      url    = "mirror://luarocks/alt-getopt-0.8.0-1.rockspec";
      sha256 = "17yxi1lsrbkmwzcn1x48x8758d7v1frsz1bmnpqfv4vfnlh0x210";
    }).outPath;
    src = fetchgit ( removeAttrs (builtins.fromJSON ''{
  