PYNQ rootfs arm v2.5 - corrupt partition table + network problems

Not specifying the bitfile results in an error when using make. Not clear what I’m doing wrong

I follow to quickly customize a default image file from the guide of Peter in

make BOARDS=zedboard PREBUILT=bionic.arm.2.5.img

with PYNQ/boards/zedboard folder consisting of

-rw-r–r-- 1 xilinx xilinx 105063271 Jun 8 21:02 avnet-digilent-zedboard-v2019.1-final.bsp
-rw-r–r-- 1 xilinx xilinx 7516192768 Jun 8 21:23 bionic.arm.2.5.img
drwxr-xr-x 3 xilinx xilinx 4096 Jun 8 21:00 petalinux_bsp/
-rw-r–r-- 1 xilinx xilinx 132 Jun 8 21:28 zedboard.SPEC

and zedboard.SPEC config equal to:
////
ARCH_zedboard := arm
BSP_zedboard := avnet-digilent-zedboard-v2019.1-final.bsp

STAGE4_PACKAGES_zedboard := pynq boot_leds ethernet
///
Results in following error for make BOARDS=zedboard PREBUILT=bionic.arm.2.5.img

zerofree
u-boot-tools
rpm2cpio
libsdl1.2-dev
rsync
python3-pip
gcc-multilib
bash /home/xilinx/PYNQ/sdbuild/scripts/check_mounts.sh
make: *** No rule to make target ‘/home/xilinx/PYNQ/sdbuild/boot/image_.its’, needed by ‘/home/xilinx/PYNQ/sdbuild/build/zedboard/image.its’. Stop.