diff --git a/kernel-builder/Dockerfile b/kernel-builder/Dockerfile
index b501312..65f5d38 100644
--- a/kernel-builder/Dockerfile
+++ b/kernel-builder/Dockerfile
@@ -6,6 +6,7 @@ RUN dpkg --add-architecture arm64 \
 	&& apt-get update && apt-get install -y \
 	bison \
 	ca-certificates \
+	cpio \
 	curl \
 	fakeroot \
 	flex \