diff --git a/Makefile b/Makefile
index 9ab9684..4e5a2b7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,11 @@
 all: its
 
-OPENWRT_VERSION=18.06.4
-
-its-tl-wr841-v10:
-	IMAGEBUILDER_URL='https://downloads.openwrt.org/releases/$(OPENWRT_VERSION)/targets/ar71xx/tiny/openwrt-imagebuilder-$(OPENWRT_VERSION)-ar71xx-tiny.Linux-x86_64.tar.xz' ./build-image.sh control/tl-wr841-v10
+OPENWRT_VERSION=19.07.3
 
 its-ubnt-unifiac-lite:
-	IMAGEBUILDER_URL='https://downloads.openwrt.org/releases/$(OPENWRT_VERSION)/targets/ar71xx/generic/openwrt-imagebuilder-$(OPENWRT_VERSION)-ar71xx-generic.Linux-x86_64.tar.xz' ./build-image.sh control/ubnt-unifiac-lite
+	IMAGEBUILDER_URL='https://downloads.openwrt.org/releases/$(OPENWRT_VERSION)/targets/ath79/generic/openwrt-imagebuilder-$(OPENWRT_VERSION)-ath79-generic.Linux-x86_64.tar.xz' ./build-image.sh control/ubnt-unifiac-lite
 
-its: its-ubnt-unifiac-lite its-tl-wr841-v10
+its: its-ubnt-unifiac-lite
 
 DATE = $(shell date +'%Y%m%d')
 VERSION = v0.$(DATE)
diff --git a/build-image.sh b/build-image.sh
index 49bc1dc..e227c82 100755
--- a/build-image.sh
+++ b/build-image.sh
@@ -1,8 +1,10 @@
 #!/bin/sh
 
+set -e
+
 [ $# -ge 1 ] || exit 1
 CONTROL="$1"; shift
-IMAGEBUILDER_URL=${IMAGEBUILDER_URL:-https://downloads.openwrt.org/snapshots/targets/ar71xx/generic/openwrt-imagebuilder-ar71xx-generic.Linux-x86_64.tar.xz}
+IMAGEBUILDER_URL=${IMAGEBUILDER_URL:-https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-imagebuilder-ath79-generic.Linux-x86_64.tar.xz}
 
 TOPDIR="$PWD"
 DLDIR=${DLDIR:-"dl"}
@@ -53,11 +55,11 @@ subtarget=$(. "$CONTROL"; echo "${SUBTARGET}")
 
     mkdir -p "$tmp"/etc
     mkdir -p "$tmp"/etc/its-access-point/
-    printf '%s\n' "$VERSION" > "$tmp"/etc/its-access-point-version # legacy
     printf '%s\n' "$VERSION" > "$tmp"/etc/its-access-point/version
     printf '%s\n' "$IMAGEBUILDER_URL" \
            > "$tmp"/etc/its-access-point/imagebuilder-url
-    sha512sum "$imagebuilder" > "$tmp"/etc/its-access-point/imagebuilder-hash
+    sha512sum "$DLDIR/$imagebuilder" \
+              > "$tmp"/etc/its-access-point/imagebuilder-hash
     cat "$CONTROL" > "$tmp"/etc/its-access-point/control
 
     if [ -n "$COMMON_FILES" ]; then
@@ -73,7 +75,7 @@ subtarget=$(. "$CONTROL"; echo "${SUBTARGET}")
     make image FILES="$tmp" 1>&2
 )
 
-cp "$IMAGEBUILDER_DIR"/bin/targets/ar71xx/"${subtarget}"/openwrt*-"${target}-${subtarget}-${profile}"-squashfs-sysupgrade.bin "$IMAGEDIR"/
+cp "$IMAGEBUILDER_DIR"/bin/targets/ath79/"${subtarget}"/openwrt*-"${target}-${subtarget}-${profile}"-squashfs-sysupgrade.bin "$IMAGEDIR"/
 
 ln -snf "$VERSION" images/latest
 
diff --git a/control/ubnt-unifiac-lite b/control/ubnt-unifiac-lite
index 9537dcf..6019612 100644
--- a/control/ubnt-unifiac-lite
+++ b/control/ubnt-unifiac-lite
@@ -1,6 +1,6 @@
-PROFILE=ubnt-unifiac-lite
+PROFILE=ubnt_unifiac-lite
 FILES=files/ubnt-unifiac-lite
-TARGET=ar71xx
+TARGET=ath79
 SUBTARGET=generic
 COMMON_FILES=files/common/its
 PACKAGES='