anchor.diff:  x@{builderDefsPackage
  -  , fuse, samba, pkgconfig
  +  , fuse, samba, pkgconfig, glib
     , ...}:
   builderDefsPackage
   (a :  
  
positive.code:   sourceInfo = rec {
      baseName="smbnetfs";
      dirBaseName="SMBNetFS";
      version = "0.5.3b";
      name="${baseName}-${version}";
      project="${baseName}";
      url="mirror://sourceforge/project/${project}/${baseName}/${dirBaseName}-${version}/${name}.tar.bz2";
  
negative.code: rec {
    src = a.fetchurl {
      url = sourceInfo.url;
      sha256 = "16sikr81ipn8v1a1zrqgnsy2as3zcaxbzkr0bm5vxy012bq0plkd";
    };
  
    inherit (sourceInfo) name version;
  