diff --git a/kernel-builder/Dockerfile b/kernel-builder/Dockerfile
index cb3bb0d..efb5c4a 100644
--- a/kernel-builder/Dockerfile
+++ b/kernel-builder/Dockerfile
@@ -1,9 +1,21 @@
-FROM debian:stretch
+FROM debian:sid
 LABEL maintainer "Jessie Frazelle <jess@linux.com>"
 
 RUN apt-get update && apt-get install -y \
 	ca-certificates \
 	curl \
+	gnupg \
+	--no-install-recommends \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN echo "deb [arch=amd64,arm64,ppc64el] http://emdebian.org/tools/debian/ unstable main" > /etc/apt/sources.list.d/crosstools.list
+RUN curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add -
+
+RUN dpkg --add-architecture arm64 \
+	&& dpkg --add-architecture ppc64el \
+	&& apt-get update && apt-get install -y \
+	crossbuild-essential-arm64 \
+	crossbuild-essential-ppc64el \
 	git \
 	kernel-package \
 	make \