diff --git a/recipes-core/packagegroups/packagegroup-ros-world-crystal.inc b/recipes-core/packagegroups/packagegroup-ros-world-crystal.inc
index cecc5ab..e7bbf45 100644
--- a/recipes-core/packagegroups/packagegroup-ros-world-crystal.inc
+++ b/recipes-core/packagegroups/packagegroup-ros-world-crystal.inc
@@ -1,3 +1,7 @@
 # packagegroup-ros-world-crystal.inc
 #
 # Copyright (c) 2019 LG Electronics, Inc.
+
+# Can't build these until we figure out how to build clang-format without building all of clang.
+RDEPENDS_${PN}_remove = "ament-clang-format"
+RDEPENDS_${PN}_remove = "ament-cmake-clang-format"