diff --git a/platforms/diskimg/post.inc.sh b/platforms/diskimg/post.inc.sh
index b0440d5..82816e8 100644
--- a/platforms/diskimg/post.inc.sh
+++ b/platforms/diskimg/post.inc.sh
@@ -1,11 +1,3 @@
-case $VARIANT in
-   bananapi) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-bpi"; DEVICEARCH=arm ;;
-   raspberrypi) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-rpi"; DEVICEARCH=arm ;;
-   cubox) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-cubox" ;;
-   livecd) MODE=usbinstall; ROOTFSINSTALL_ADD="-cubox" ;;
-   *) MODE=rootfsinstall; ROOTFSINSTALL_ADD= ; DEVICEARCH=$ARCH ;;
-esac
-
 if [ "$MODE" = "rootfsinstall" ]; then
    /usr/sbin/rootfsinstall -y $ROOTFSINSTALL_ADD $LOOPDEV \
       $LOCALSTATEDIR/openmamba-rootfs-light-$LANGUAGE.$DEVICEARCH.tar.xz || \
diff --git a/platforms/diskimg/pre.inc.sh b/platforms/diskimg/pre.inc.sh
new file mode 100644
index 0000000..c0bbc46
--- /dev/null
+++ b/platforms/diskimg/pre.inc.sh
@@ -0,0 +1,7 @@
+case $VARIANT in
+   bananapi) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-bpi"; DEVICEARCH=arm; MEDIA_SIZE=1920 ;;
+   raspberrypi) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-rpi"; DEVICEARCH=arm; MEDIA_SIZE=1920 ;;
+   cubox) MODE=rootfsinstall; ROOTFSINSTALL_ADD="-cubox" DEVICEARCH=arm; MEDIA_SIZE=1920 ;;
+   livecd) MODE=usbinstall; ROOTFSINSTALL_ADD= ;;
+   *) MODE=rootfsinstall; ROOTFSINSTALL_ADD= ; DEVICEARCH=$ARCH ;;
+esac