anchor.diff:    pname = "lpeglabel";
     version = "1.6.0-1";
     knownRockspec = (fetchurl {
  -    url    = "https://luafr.org/luarocks/lpeglabel-1.6.0-1.rockspec";
  +    url    = "mirror://luarocks/lpeglabel-1.6.0-1.rockspec";
       sha256 = "13gc32pggng6f95xx5zw9n9ian518wlgb26mna9kh4q2xa1k42pm";
     }).outPath;
     src = fetchurl {
  
positive.code:   pname = "luadbi";
    version = "0.7.2-1";
    knownRockspec = (fetchurl {
      url    = "https://luarocks.org/luadbi-0.7.2-1.rockspec";
      sha256 = "0lj1qki20w6bl76cvlcazlmwh170b9wkv5nwlxbrr3cn6w7h370b";
    }).outPath;
    src = fetchgit ( removeAttrs (builtins.fromJSON ''{
  
negative.code:   pname = "lyaml";
    version = "6.2.7-1";
    knownRockspec = (fetchurl {
      url    = "mirror://luarocks/lyaml-6.2.7-1.rockspec";
      sha256 = "0m5bnzg24nyk35gcn4rydgzk0ysk1f6rslxwxd0w3drl1bg64zja";
    }).outPath;
    src = fetchurl {
  