diff --git a/default.nix b/default.nix
index 18f17fc3146f52eeae9a9e1143dec2c392df370e..24ea4001414a9e065085ecadf725ca8417b72e90 100644
--- a/default.nix
+++ b/default.nix
@@ -26,6 +26,8 @@ in
       fixtures = "wheel";
       testtools = "wheel";
       traceback2 = "wheel";
+      # - Incorrectly merged extras - https://github.com/DavHau/mach-nix/pull/334
+      tqdm = "wheel";
     };
     tahoe-lafs = mach-nix.buildPythonPackage rec {
       python = "python27";