diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index 8ff20869b94..93990360c1a 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python, pythonPackages }:
+{ stdenv, fetchurl, python2 }:
 
 stdenv.mkDerivation rec {
   name = "mailman-${version}";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "1r6sjapjmbav45xibjzc2a8y1xf4ikz09470ma1kw7iz174wn8z7";
   };
 
-  buildInputs = [ python pythonPackages.dnspython ];
+  buildInputs = [ python2 python2.pkgs.dnspython ];
 
   patches = [ ./fix-var-prefix.patch ];