diff --git a/nix/t1/conversion/sv-to-vcs-simulator.nix b/nix/t1/conversion/sv-to-vcs-simulator.nix
index 3e1074e15..4627af48a 100644
--- a/nix/t1/conversion/sv-to-vcs-simulator.nix
+++ b/nix/t1/conversion/sv-to-vcs-simulator.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   ]
   ++ lib.optionals enableCover [
     "-cm"
-    "line+cond+fsm+tgl+branch+assert"
+    "assert"
     "-cm_dir"
     "./cm"
   ]