diff --git a/kernel-builder/Dockerfile b/kernel-builder/Dockerfile
index 1dbeb23..84563d7 100644
--- a/kernel-builder/Dockerfile
+++ b/kernel-builder/Dockerfile
@@ -15,6 +15,7 @@ RUN apk add --no-cache \
 	mpc1-dev \
 	mpfr-dev \
 	ncurses-dev \
+	perl \
 	tar
 
 ENV HOME /root
diff --git a/kernel-builder/build_kernel b/kernel-builder/build_kernel
index 4a823a1..8e1caae 100755
--- a/kernel-builder/build_kernel
+++ b/kernel-builder/build_kernel
@@ -73,7 +73,7 @@ install_kernel(){
 		fi
 
 		# Git clone and apply the patches for the aufs filesystem.
-		if [[ "$OPT" == "aufs" ]]; then
+		if [[ "$OPT" == "aufs" ]] && [[ ! -d "${DIR}/fs/aufs" ]]; then
 			aufsdir=/aufs4-standalone
 
 			echo "Cloning the git patches for the aufs filesystem..."
@@ -135,3 +135,7 @@ install_kernel(){
 }
 
 install_kernel $@
+
+echo "Kernel successfully installed!"
+echo "You will now want to run update-initramfs and update-grub"
+echo "or the equivalent for your system."