diff --git a/build-arm-images.sh.in b/build-arm-images.sh.in
index 4b01d5c..875d00e 100644
--- a/build-arm-images.sh.in
+++ b/build-arm-images.sh.in
@@ -1,11 +1,15 @@
 #!/bin/sh
 
+TARGET="$1"
+
 set -e
 
 PLATFORMS="beaglebone cubieboard2 odroid-u2 rpi rpi2 usbarmory"
 DATE=$(date '+%Y%m%d')
 
 for f in ${PLATFORMS}; do
-	./mkimage.sh void-${f}-rootfs-${DATE}.tar.xz
-	xz -T0 void-${f}-${DATE}.img
+	if [ -z "$TARGET" -o "$TARGET" = "$f" ]; then
+		./mkimage.sh void-${f}-rootfs-${DATE}.tar.xz
+		xz -T0 void-${f}-${DATE}.img
+	fi
 done
diff --git a/build-rootfs.sh.in b/build-rootfs.sh.in
index 5d5644d..16ae5bf 100644
--- a/build-rootfs.sh.in
+++ b/build-rootfs.sh.in
@@ -2,8 +2,12 @@
 
 set -e
 
+TARGET="$1"
+
 PLATFORMS="beaglebone cubieboard2 odroid-u2 rpi rpi2 usbarmory"
 
 for f in ${PLATFORMS}; do
-	./mkrootfs.sh $@ $f
+	if [ -z "$TARGET" -o "$TARGET" = "$f" ]; then
+		./mkrootfs.sh $@ $f
+	fi
 done