anchor.diff:  
   let
     pname = "krb5";
  -  version = "1.10";
  +  version = "1.11.1";
     name = "${pname}-${version}";
     webpage = http://web.mit.edu/kerberos/;
   in
  
positive.code:   inherit name;
  
    src = fetchurl {
      url = "${webpage}/dist/krb5/1.10/${name}-signed.tar";
      sha256 = "1pa4m6538drb51gsqxbbxlsnc9fm9ccid9m2s3pv3di5l0a7l8bg";
    };
  
    buildInputs = [ perl ncurses yacc ];
  
negative.code:     cd ${name}/src
    '';
  
    #doCheck = true; # report: No suitable file for testing purposes
  
    meta = {
      description = "MIT Kerberos 5";
      homepage = webpage;
      license = "MPL";
    };
  })
  