anchor.diff:        elpaBuild {
           pname = "org-plus-contrib";
           ename = "org-plus-contrib";
  -        version = "20181230";
  +        version = "20190527";
           src = fetchurl {
  -          url = "http://orgmode.org/elpa/org-plus-contrib-20181230.tar";
  -          sha256 = "0gibwcjlardjwq19bh0zzszv0dxxlml0rh5iikkcdynbgndk1aa1";
  +          url = "http://orgmode.org/elpa/org-plus-contrib-20190527.tar";
  +          sha256 = "16kf47ij25fijf6pbfxzq9xzildj1asdzhnkf5zv5pn4312pvgnq";
           };
           packageRequires = [];
           meta = {
  
positive.code:       elpaBuild {
          pname = "org";
          ename = "org";
          version = "20181230";
          src = fetchurl {
            url = "http://orgmode.org/elpa/org-20181230.tar";
            sha256 = "1ydl6cikf4myrz59qvajbdxg1bvbpqjlkxn54qhrhh4755llcfkv";
          };
          packageRequires = [];
          meta = {
  
negative.code:           license = lib.licenses.free;
          };
        }) {};
    }
  