diff --git a/tools/build/options/WITH_META_MODE b/tools/build/options/WITH_META_MODE
index a2680e31f25a..775ab0197f83 100644
--- a/tools/build/options/WITH_META_MODE
+++ b/tools/build/options/WITH_META_MODE
@@ -42,3 +42,6 @@ The build operates as it normally would otherwise.
 This option originally invoked a different build system but that was renamed
 to
 .Va WITH_DIRDEPS_BUILD .
+.Pp
+Currently this also enforces
+.Va WITHOUT_SYSTEM_COMPILER .