81err

[ 81% 25374/31113] Target userdata fs image: out/target/product/dorado/userdata.img
FAILED: /bin/bash -c "(mkdir -p out/target/product/dorado/data ) && (mkdir -p out/target/product/dorado/obj/PACKAGING/userdata_intermediates && rm -rf out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"system_size=786432000\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"userdata_size=2824863744\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"cache_size=67108864\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"extfs_sparse_flag=-s\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"squashfs_sparse_flag=-s\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"selinux_fc=out/target/product/dorado/root/file_contexts.bin\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (echo \"skip_fsck=true\" >>  out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt ) && (PATH=\$PATH ./build/tools/releasetools/build_image.py out/target/product/dorado/data out/target/product/dorado/obj/PACKAGING/userdata_intermediates/userdata_image_info.txt out/target/product/dorado/userdata.img out/target/product/dorado/system ) && (size=\$(for i in out/target/product/dorado/userdata.img; do stat --format \"%s\" \"\$i\" | tr -d '\\n'; echo +; done; echo 0); total=\$(( \$( echo \"\$size\" ) )); printname=\$(echo -n \"out/target/product/dorado/userdata.img\" | tr \" \" +); img_blocksize=2112; twoblocks=\$((img_blocksize * 2)); onepct=\$(((((2913140736 / 100) - 1) / img_blocksize + 1) * img_blocksize)); reserve=\$((twoblocks > onepct ? twoblocks : onepct)); maxsize=\$((2913140736 - reserve)); echo \"\$printname maxsize=\$maxsize blocksize=\$img_blocksize total=\$total reserve=\$reserve\"; if [ \"\$total\" -gt \"\$maxsize\" ]; then echo \"error: \$printname too large (\$total > [2913140736 - \$reserve])\"; false; elif [ \"\$total\" -gt \$((maxsize - 32768)) ]; then echo \"WARNING: \$printname approaching size limit (\$total now; limit \$maxsize)\"; fi )"
error: failed to build out/target/product/dorado/userdata.img from out/target/product/dorado/data
Error: unknown filesystem type ''