anchor.diff: -{ lib, stdenv, fetchurl, openssl, fetchpatch }:
  +{ lib, stdenv, fetchurl, openssl, pam, fetchpatch }:
   
   stdenv.mkDerivation rec {
     pname = "pure-ftpd";
  
positive.code:     sha256 = "08zas1kg5pnckl28gs7q29952pjfyj8rj59bq96hscqbni7gkqmb";
    };
  
    buildInputs = [ openssl ];
  
    configureFlags = [ "--with-tls" ];
  
  
negative.code:     homepage = "https://www.pureftpd.org";
      license = licenses.isc; # with some parts covered by BSD3(?)
      maintainers = [ ];
      platforms = platforms.unix;
    };
  }
  