diff --git a/exprs/overlay.nix b/exprs/overlay.nix
index 70516e0..8e87c46 100644
--- a/exprs/overlay.nix
+++ b/exprs/overlay.nix
@@ -17,5 +17,7 @@ final: prev: {
       fetchSubmodules = true;
       hash = "sha256-8PXqMDf2ATxmtFqyZlGip+DhGrdK8M6Ztte7fGH6Fmo=";
     };
+
+    meta.license = prev.lib.licenses.mit; # removes unfree error
   });
 }