anchor.diff:      url = "https://github.com/apple/cups/releases/download/v${version}/"
         + "cups-${version}-source.tar.gz";
       hashOutput = false;
  -    sha256 = "3c4b637b737077565ccdfbd5f61785d03f49461ae736fcc2c0ffaf41d2c6ea6a";
  +    sha256 = "3968fc1d26fc48727508db1c1380e36c6694ab90177fd6920aec5f6cc73af9e4";
     };
   
     buildInputs = [
  
positive.code:     boolEn
      boolWt;
  
    version = "2.2.7";
  in
  stdenv.mkDerivation rec {
    name = "cups-${version}";
  
negative.code:         outputHashAlgo
          urls;
        failEarly = true;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sig") urls;
          pgpKeyFingerprint = "45D0 8394 6E30 3528 2B3C  CA9A F434 1042 35DA 97EB";
        };
      };
    };
  
  