anchor.diff:    meta = {
       homepage = "http://www.postfix.org/";
       description = "A fast, easy to administer, and secure mail server";
  -    license = stdenv.lib.licenses.bsdOriginal;
  -    platforms = stdenv.lib.platforms.linux;
  -    maintainers = [ stdenv.lib.maintainers.rickynils ];
  +    license = lib.licenses.bsdOriginal;
  +    platforms = lib.platforms.linux;
  +    maintainers = [ lib.maintainers.rickynils ];
     };
   
   }
  
positive.code:     export readme_directory=$out/share/postfix/doc
      export sendmail_path=$out/bin/sendmail
  
      make makefiles \
        CCARGS='-DUSE_TLS -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I${cyrus_sasl}/include/sasl \
                -DHAS_DB_BYPASS_MAKEDEFS_CHECK \
                -fPIE -fstack-protector-all --param ssp-buffer-size=4 -O2 -D_FORTIFY_SOURCE=2' \
        AUXLIBS='-ldb -lnsl -lresolv -lsasl2 -lcrypto -lssl -pie -Wl,-z,relro,-z,now'
    '';
  
    installTargets = [ "non-interactive-package" ];
  
    installFlags = [ " install_root=installdir " ];
  
    postInstall = ''
      mkdir -p $out
  
negative.code:     sha256 = "00mc12k5p1zlrlqcf33vh5zizaqr5ai8q78dwv69smjh6kn4c7j0";
    };
  
    buildInputs = [ makeWrapper gnused db openssl cyrus_sasl icu pcre ]
                  ++ lib.optional withPgSQL postgresql
                  ++ lib.optional withMySQL libmysql
                  ++ lib.optional withSQLite sqlite;
  
    patches = [ ./postfix-script-shell.patch ./postfix-3.0-no-warnings.patch ];
  
  