diff --git a/pkgs/by-name/pr/pretix/package.nix b/pkgs/by-name/pr/pretix/package.nix
index 9cd89e0d4528..e7146d5fe3f1 100644
--- a/pkgs/by-name/pr/pretix/package.nix
+++ b/pkgs/by-name/pr/pretix/package.nix
@@ -99,6 +99,7 @@ python.pkgs.buildPythonApplication rec {
     "django-compressor"
     "django-filter"
     "django-formset-js-improved"
+    "django-formtools"
     "django-i18nfield"
     "django-localflavor"
     "django-phonenumber-field"