anchor.diff:        "mirror://sourceforge/freetype/${name}.tar.bz2"
       ];
       hashOutput = false;
  -    sha256 = "db8d87ea720ea9d5edc5388fc7a0497bb11ba9fe972245e0f7f4c7e8b1e1e84d";
  +    sha256 = "fccc62928c65192fff6c98847233b28eb7ce05f12d2fea3f6cc90e8b4e5fbe06";
     };
   
     buildInputs = [
  
positive.code:         outputHashAlgo
          urls;
        failEarly = true;
        pgpsigUrls = map (n: "${n}.sig") src.urls;
        pgpKeyFingerprint = "58E0 C111 E39F 5408 C5D3  EC76 C1A6 0EAC E707 FDA5";
      };
    };
  
  
negative.code:     optionalString;
  in
  stdenv.mkDerivation rec {
    name = "freetype-2.10.0";
  
    src = fetchurl {
      urls = [
  