anchor.diff:    inherit name;
   
     src = fetchurl {
  -    url = "${webpage}dist/krb5/1.12/${name}-signed.tar";
  -    sha256 = "0i1p9xx5s9q0sqnnz7f3rba07882zciw0mwc6yvv7hmm0w0iig89";
  +    url = "${webpage}dist/krb5/1.13/${name}-signed.tar";
  +    sha256 = "10lmbbcrzknzjnhlfjgb4rc3vzncqhmd0kp82pwd0xxpkap7k3yw";
     };
   
  -  buildInputs = [ perl ncurses yacc ];
  +  buildInputs = [ pkgconfig perl ncurses yacc openssl openldap ];
   
     unpackPhase = ''
       tar -xf $src
  
positive.code:     cd ${name}/src
    '';
  
    configureFlags = "--with-tcl=no";
  
    #doCheck = true; # report: No suitable file for testing purposes
  
    enableParallelBuilding = true;
  
    meta = {
      description = "MIT Kerberos 5";
      homepage = webpage;
      license = "MPL";
    };
  })
  
negative.code: { stdenv, fetchurl, pkgconfig, perl, ncurses, yacc, openssl, openldap }:
  
  let
    pname = "krb5";
    version = "1.13";
    name = "${pname}-${version}";
    webpage = http://web.mit.edu/kerberos/;
  in
  