anchor.diff:  
     buildInputs = [
       boost
  -    botan2
       libmysqlclient
       log4cplus
  +    openssl
       python3
     ];
   
  
positive.code: { stdenv
  , lib
  , fetchurl
  , autoreconfHook
  , pkg-config
  , boost
  , botan2
  , libmysqlclient
  , log4cplus
  , postgresql
  , python3
  , nixosTests
  }:
  
  
negative.code:     "--enable-perfdhcp"
      "--enable-shell"
      "--localstatedir=/var"
      "--with-openssl=${lib.getDev openssl}"
      "--with-mysql=${lib.getDev libmysqlclient}/bin/mysql_config"
      "--with-pgsql=${postgresql}/bin/pg_config"
    ];
  