anchor.diff:        rev = "ddfd03e49b05fba702539a4aff03e60ea35a57e0";
         sha256 = "1dbxp9w7pjw1zf50x3hz6kwzm8xp3hvdbswnxsrcswagvqmc5kkm";
         runTests = false;
  +      prebuiltSha256 = {
  +        "2.11" = "0gvj00n64mlri9rp8s4ifw0kpb8f8ffxh0kirwpkhkg0hy63cbg9";
  +        "2.10" = "0xldlrqxbzyi9l8v5vdwf8inry3xgjad63mmqw2amy8zsqgmjfmg";
  +        "2.9.3" = "10jd7dfx39q3wamm4dj49bak7msxzfwc4mx8bq6xd35g8j52j6ya";
  +        "2.9.2" = "0nfvx9zax3cf8gc165za84dxg8qy8jb5m4svmhn87fh1wgadja4g";
  +        "2.9.1-1" = "1fkrs3pwrjgz0cmmyx5n2l987i9xqanp9cifwrfz7ls16ajn9gyk";
  +        "2.9.1" = "012d8bwx646w1wzzbmr5q36vxywx2slwv5k0d7lk00d7296b3sqh";
  +        "2.9.0-1" = "1npm10nrmicnqnv8iq862fflxkf79gwn9fq7wvvdgaa3n8bgjgm3";
  +        "2.9.0" = "0wqp8xid73viq4y4cgzmh42035p99h7z8wcrimr9gqwglg51xwq4";
  +      };
         scalaVersions = {
           inherit (scalaVersions) "2.11" "2.10" "2.9.3" "2.9.2" "2.9.1-1" "2.9.1" "2.9.0-1" "2.9.0";
         };
  
positive.code:     "1.10.0" = {
        rev = "2338afc425a905fdc55b4fd67bd8bfc3358e3390";
        sha256 = "0a3kgdqpr421k624qhpan3krjdhii9fm4zna7fbbz3sk30gbcsnj";
        scalaVersions = {
          inherit (scalaVersions) "2.11" "2.10" "2.9.3" "2.9.2" "2.9.1-1" "2.9.1" "2.9.0-1" "2.9.0";
        };
  
negative.code:   };
  
  in rec {
  
    # Fetches the given ScalaCheck with the given Scala version from Maven
    fetchScalaChecks = scVer: sc: mapAttrsToList (scalaVer: scala:
      fetchScalaCheck scalaVer scala scVer sc
    ) sc.scalaVersions;
  
    # Fetches the given ScalaCheck with the given Scala version from Maven
    fetchScalaCheck = scalaVer: scala: scVer: sc: stdenv.mkDerivation rec {
      name = "scalacheck_${scalaVer}-${scVer}";
  
      src = fetchurl {
        url = "http://search.maven.org/remotecontent?filepath=org/scalacheck/scalacheck_${scalaVer}/${scVer}/${name}.jar";
        sha256 = getAttr scalaVer sc.prebuiltSha256;
      };
  
      phases = [ "installPhase" ];
  
      installPhase = ''
        mkdir -p "$out"
        cp -v "$src" "$out/${name}.jar"
      '';
    };
  
    # Builds the given ScalaCheck with all Scala versions it supports
    mkScalaChecks = scVer: sc: mapAttrsToList (scalaVer: scala:
  