anchor.diff:    src = fetchurl {
       urls = map (n: "${n}.xz") tarballUrls;
       hashOutput = false;
  -    sha256 = "f346eeb90cce0910c05b877fe49eadc760fa084c0455fd313e39d4b2c2d4bb21";
  +    sha256 = "fcc0431cc951c3563f1e4f946d27c8e2161cfd81f25316e6bd783fa6118469e0";
     };
   
     nativeBuildInputs = [
  
positive.code:     "SHARED=yes"
      "ZLIB=yes"
      "DNS=yes"
    ];
  
    installTargets = [
  
negative.code: }:
  
  let
    name = "pciutils-3.6.1"; # with database from 2017-11
  
    tarballUrls = [
      "mirror://kernel/software/utils/pciutils/${name}.tar"
  