diff --git a/pkgs/development/python-modules/md2gemini/default.nix b/pkgs/development/python-modules/md2gemini/default.nix
index 9c4215940aa5..e50c405334c1 100644
--- a/pkgs/development/python-modules/md2gemini/default.nix
+++ b/pkgs/development/python-modules/md2gemini/default.nix
@@ -19,5 +19,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/makeworld-the-better-one/md2gemini";
     license = licenses.lgpl3Plus;
     maintainers = [ maintainers.kaction ];
+    broken = versionAtLeast mistune.version "3";
   };
 }