diff --git a/pkgs/servers/mail/mailman/package.nix b/pkgs/servers/mail/mailman/package.nix
index cb5dc354cf74..d008f2389d62 100644
--- a/pkgs/servers/mail/mailman/package.nix
+++ b/pkgs/servers/mail/mailman/package.nix
@@ -42,6 +42,7 @@ buildPythonPackage rec {
     python-dateutil
     requests
     sqlalchemy
+    standard-nntplib
     zope-component
     zope-configuration
   ];