diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 461093c..707d9cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,6 @@
                     "include": [
                         { "distro": "debian:sid" },
                         { "distro": "fedora:latest" },
-                        { "distro": "centos:8" },
                         {
                             "distro": "fedora:latest",
                             "compiler": "clang",
diff --git a/src/verto.c b/src/verto.c
index 643474e..af81468 100644
--- a/src/verto.c
+++ b/src/verto.c
@@ -610,6 +610,9 @@ verto_free(verto_ctx *ctx)
 void
 verto_cleanup(void)
 {
+#ifdef BUILTIN_MODULE
+    return;
+#else
     module_record *record;
 
     mutex_lock(&loaded_modules_mutex);
@@ -624,6 +627,7 @@ verto_cleanup(void)
 
     mutex_unlock(&loaded_modules_mutex);
     mutex_destroy(&loaded_modules_mutex);
+#endif
 }
 
 void