{stdenv, fetchurl, db4, glibc}:

stdenv.mkDerivation {
  name = "postfix-2.2.11";
  src = fetchurl {
    url = ftp://ftp.cs.uu.nl/mirror/postfix/postfix-release/official/postfix-2.2.11.tar.gz;
    sha256 = "04hxpyd3h1f48fnppjwqqxbil13bcwidzpfkra2pgm7h42d9blq7";
  };

  installTargets = ["non-interactive-package"];
  installFlags = [" install_root=$out "];
  preInstall = "sed -e '/^PATH=/d' -i postfix-install";
  postInstall = ''
    ensureDir $out
    mv ut/$out/* $out/
  '';

  preBuild = ''
    export daemon_directory=$out/libexec/postfix
    export command_directory=$out/sbin
    export queue_directory=/var/spool/postfix
    export sendmail_path=$out/bin/sendmail
    export mailq_path=$out/bin/mailq
    export newaliases_path=$out/bin/newaliases
    export html_directory=$out/share/postfix/doc/html
    export manpage_directory=$out/share/man
    export sample_directory=$out/share/postfix/doc/samples
    export readme_directory=$out/share/postfix/doc
  '';

  buildinputs = [db4];
  patches = [./postfix-2.2.9-db.patch ./postfix-2.2.9-lib.patch];
  inherit glibc;
}