diff --git a/overrides/default.nix b/overrides/default.nix
index b88d7b8..dae7ae7 100644
--- a/overrides/default.nix
+++ b/overrides/default.nix
@@ -2191,7 +2191,7 @@ lib.composeManyExtensions [
 
       rich = super.rich.overridePythonAttrs (
         old: {
-          buildInputs = (old.buildInputs or [ ]) ++ [ self.commonmark ];
+          buildInputs = (old.buildInputs or [ ]) ++ [ self.CommonMark ];
         }
       );