diff --git a/pkgs/servers/mail/mailman/hyperkitty.nix b/pkgs/servers/mail/mailman/hyperkitty.nix
index f66b0a9f6b03..d1e4581789e0 100644
--- a/pkgs/servers/mail/mailman/hyperkitty.nix
+++ b/pkgs/servers/mail/mailman/hyperkitty.nix
@@ -43,6 +43,9 @@ buildPythonPackage rec {
   postPatch = ''
     # isort is a development dependency
     sed -i '/isort/d' setup.py
+    # Fix mistune imports for mistune >= 2.0.0
+    # https://gitlab.com/mailman/hyperkitty/-/merge_requests/379
+    sed -i 's/mistune.scanner/mistune.util/' hyperkitty/lib/renderer.py
   '';
 
   propagatedBuildInputs = [