diff --git a/build/root/Makefile b/build/root/Makefile
index b464e756381..72dcae6f958 100644
--- a/build/root/Makefile
+++ b/build/root/Makefile
@@ -291,6 +291,7 @@ test-cmd:
 	@echo "$$TEST_CMD_HELP_INFO"
 else
 test-cmd: generated_files
+	source hack/lib/init.sh
 	hack/make-rules/test-cmd.sh
 endif