buildx failed with: ERROR: failed to solve: process "/bin/sh -c mkdir -p $BUILD_BASE/buildroot/work && cd $BUILD_BASE/buildroot && git pull && git apply patches/* && cp ***-buildroot-config work/.config && cp local.mk work/local.mk && make BR2_EXTERNAL=$BUILD_BASE/buildroot/external O=work olddefconfig && make -C work && cp work/images/rootfs.ext2 $BUILD_BASE/artifacts/$ROOTFS_FILENAME && truncate -s %4096 $BUILD_BASE/artifacts/$ROOTFS_FILENAME" did not complete successfully: exit code: 2