anchor.diff:        (pkgs.lib.optionalAttrs (buildForAmiga)
           (let
             amigaosenv = import amigaosenvPath {
  -            inherit (pkgs) stdenv uae procps;
  -            lndir = pkgs.xorg.lndir;
  +            inherit (pkgs) stdenv fetchurl lhasa uae fsuae procps bchunk cdrtools;
  +            inherit (pkgs.xorg) lndir;
             };
           in
           {
  
positive.code:               make check
                make install
              '';
            };
          }));
    };
  
negative.code: , buildForAmiga ? false
  , buildForWindows ? false
  , amigaosenvPath ? <amigaosenv>
  , kickstartROMFile ? null
  , baseDiskImage ? null
  , useUAE ? true
  , libamivideo ? {outPath = ./.; rev = 1234;}
  , officialRelease ? false
  }:
  