anchor.diff:  }:
   
   let
  -  version = "5.18.12";
  +  version = "5.18.14";
   
     tarballUrls = version: [
       "mirror://gnu/autogen/rel${version}/autogen-${version}.tar.xz"
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "be3ba62e883185b6ee8475edae97d7197d701d6b9ad9c3d2df53697110c1bfd8";
    };
  
    nativeBuildInputs = [
  
negative.code:     gmp
    ];
  
    configureFlags = [
      "--enable-snprintfv-install"
    ];
  
    # Fix a broken sed expression used for detecting the minor
    # version of guile we are using
    postPatch = ''
  