anchor.diff:            })
             (fetchurl {
               url = mirror://ubuntu/dists/raring/universe/binary-amd64/Packages.bz2;
  -            sha256 = "0caf561bad359e8a82a987a076c0f1cb7a43412a5de053c105b160477c192978";
  +            sha256 = "8aba137ae18540a12de03a564c11496431a150ab2d4d1e93e2b4b691fa2a4850";
             })
           ];
         urlPrefix = mirror://ubuntu;
  
positive.code:       packagesList =
          [ (fetchurl {
              url = mirror://ubuntu/dists/trusty/main/binary-amd64/Packages.bz2;
              sha256 = "11cw9flmnq3wappmwk87h19jzyrsan15h6p0mmb30ypnrqaz7g9j";
            })
            (fetchurl {
              url = mirror://ubuntu/dists/trusty/universe/binary-amd64/Packages.bz2;
              sha256 = "06nn3ci8s7zgwharxm76bcbqmnqknpds67zffylyii5hgmbjcnxm";
            })
          ];
        urlPrefix = mirror://ubuntu;
  
negative.code:           })
            (fetchurl {
              url = mirror://ubuntu/dists/saucy/universe/binary-amd64/Packages.bz2;
              sha256 = "a899ce5513ce8540ce9b8da4c1cd85b16b231900881b3aa559f7ac3182cdbfc8";
            })
          ];
        urlPrefix = mirror://ubuntu;
  