diff --git a/.builds/check.yml b/.builds/check.yml
index 7b9567b..1349da7 100644
--- a/.builds/check.yml
+++ b/.builds/check.yml
@@ -3,6 +3,7 @@ packages:
   - openssl
   - go
   - musl
+  - clang
 sources:
   - https://git.e3t.cc/~core/trifid
 tasks: