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52564e65d5
We've few low spec (make -j3) build workers attached to the 22.03 buildbot instance which from time to time exhibit following build failure during image generation: + dd bs=512 if=root.ext4 of=openwrt-22.03-snapshot-r20028-43d71ad93e-at91-sama7-microchip_sama7g5-ek-ext4-sdcard.img.gz.img seek=135168 conv=notrunc dd: failed to open 'root.ext4': No such file or directory Thats likely due to the fact, that on buildbots we've `TARGET_PER_DEVICE_ROOTFS=y` which produces differently named filesystem image in the SD card image target dependency chain: make_ext4fs -L rootfs ... root.ext4+pkg=68b329da and that hardcoded root.ext4 becomes available from other target in the later stages. So lets fix this issue by using IMAGE_ROOTFS Make variable which should contain proper path to the root filesystem image. Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit 5c3679e39b615ff29c9315f810e8e15775cc2d01)