build: specify ext4 filesystem when mounting rootfs

[robin-reckmann]

When mounting the rootfs image in the system build, the filesystem is not explicitly specified and the script relies on the automatic detection. This leads to an error when using OrbStack, where the necessary ext4 kernel module is not loaded automatically in this case.

Specify the filesystem explicitly here to avoid this OrbStack issue.

Tested with Docker and OrbStack on macOS.

[github-actions]

vamOS System Profile

Changes vs master

Metric	Change
Used space	3438.4MB → 3558.0MB (+119.6MB)
Sparse image	3392.5MB → 3508.4MB (+115.9MB)
Package count	526 → 529

Added packages: MesaLib-devel-26.2.5_1, SPIRV-LLVM-Translator22-22.1.6_1, Vulkan-Headers-1.4.357.0_1, clang21-21.1.8_1, clang21-headers-21.1.8_1, clang22-headers-22.1.8_1, cmake-4.2.2_3, compiler-rt21-21.1.8_1, curl-8.22.0_1, dhcpcd-10.3.2_4, dnssec-anchors-20261013_1, expat-2.9.0_1, expat-devel-2.9.0_1, f2fs-tools-1.17.0_1, foot-terminfo-1.28.0_1, fuse3-3.18.3_1, git-lfs-3.7.1_2, glib-2.88.3_1, glib-devel-2.88.3_1, groff-1.24.2_1, jsoncpp-1.9.8_1, kitty-terminfo-0.48.2_2, libbpf-1.8.0_1, libclang-cpp21-21.1.8_1, libclang-cpp22-22.1.8_1, libclang21-21.1.8_1, libcrypto3-3.6.5_1, libcurl-8.22.0_1, libcurl-devel-8.22.0_1, libgbm-26.2.5_1, libgbm-devel-26.2.5_1, libglib-devel-2.88.3_1, libharfbuzz-14.4.0_1, libllvm21-21.1.8_1, libllvm22-22.1.8_1, libnfsidmap-3.1.1_1, libomp21-21.1.8_1, libomp21-devel-21.1.8_1, libpcap-1.11.0_1, libpcre2-10.49_1, libpipewire-1.6.9_1, libpng-1.6.59_1, libpng-devel-1.6.59_1, libssl3-3.6.5_1, libthai-0.1.30_1, libtirpc-1.3.8_2, libunbound-1.26.1_1, llvm21-21.1.8_1, m4-1.4.21_1, mdocml-1.14.6_10, mesa-26.2.5_1, mesa-dri-26.2.5_1, mesa-libclc-22.1.8.3_1, mesa-libgallium-26.2.5_1, mesa-opencl-26.2.5_1, mlir21-21.1.8_1, nfs-utils-3.1.1_1, nspr-4.40_1, nss-3.130_1, openssh-10.6p1_2, openssl-3.6.5_1, openssl-devel-3.6.5_1, pcre2-devel-10.49_1, pipewire-devel-1.6.9_1, pv-1.12.0_1, python3-3.14.8_1, python3-Mako-1.4.1_1, python3-MarkupSafe-3.0.4_1, python3-Pygments-2.21.0_1, python3-parsing-3.3.3_1, rpcbind-1.3.1_2, rsync-3.5.1_1, runit-2.3.1_2, stress-ng-0.22.01_1, texinfo-7.3_2, tmux-3.7c_1, tzdata-2026e_1, vim-9.2.1031_1, vim-common-9.2.1031_1, vulkan-loader-1.4.357.0_1, vulkan-loader-devel-1.4.357.0_1, xorgproto-2026.1_1, xxd-9.2.1031_1

Removed packages: MesaLib-devel-26.1.8_1, SPIRV-LLVM-Translator21-21.1.7_1, Vulkan-Headers-1.4.350.1_1, clang21-21.1.7_1, clang21-headers-21.1.7_1, cmake-4.2.2_2, compiler-rt21-21.1.7_1, curl-8.21.0_1, dhcpcd-10.3.2_1, dnssec-anchors-20260505_1, expat-2.8.3_1, expat-devel-2.8.3_1, f2fs-tools-1.16.0_2, foot-terminfo-1.27.0_1, fuse3-3.18.2_2, git-lfs-3.7.1_1, glib-2.88.0_1, glib-devel-2.88.0_1, groff-1.23.0_1, jsoncpp-1.9.6_1, kitty-terminfo-0.48.2_1, libbpf-1.7.0_1, libclang-cpp21-21.1.7_1, libclang21-21.1.7_1, libclc21-21.1.7_1, libcrypto3-3.6.3_1, libcurl-8.21.0_1, libcurl-devel-8.21.0_1, libgbm-26.1.8_1, libgbm-devel-26.1.8_1, libglib-devel-2.88.0_1, libharfbuzz-14.3.1_1, libllvm21-21.1.7_1, libnfsidmap-2.9.2_1, libomp21-21.1.7_1, libomp21-devel-21.1.7_1, libpcap-1.10.6_1, libpcre2-10.47_1, libpipewire-1.6.7_1, libpng-1.6.58_1, libpng-devel-1.6.58_1, libssl3-3.6.3_1, libthai-0.1.29_1, libtirpc-1.3.7_2, libunbound-1.26.0_1, llvm21-21.1.7_1, m4-1.4.19_1, mdocml-1.14.6_8, mesa-26.1.8_1, mesa-dri-26.1.8_1, mesa-libgallium-26.1.8_1, mesa-opencl-26.1.8_1, mlir21-21.1.7_1, nfs-utils-2.9.2_1, nspr-4.39_1, nss-3.128_1, openssh-10.5p1_1, openssl-3.6.3_1, openssl-devel-3.6.3_1, pcre2-devel-10.47_1, pipewire-devel-1.6.7_1, pv-1.11.0_1, python3-3.14.6_1, python3-Mako-1.3.2_3, python3-MarkupSafe-3.0.3_2, python3-Pygments-2.20.0_1, python3-parsing-3.3.2_1, rpcbind-1.2.9_1, rsync-3.4.4_1, runit-2.3.1_1, stress-ng-0.22.00_1, texinfo-7.3_1, tmux-3.7b_1, tzdata-2026c_1, vim-9.2.0506_1, vim-common-9.2.0506_1, vulkan-loader-1.4.350.1_1, vulkan-loader-devel-1.4.350.1_1, xorgproto-2025.1_1, xxd-9.2.0506_1

Directory size changes (>1MB)

Directory	Change

---

Metric	Value
Used space	3558.0MB / 5959.5MB
Files	54833
Directories	4694
Symlinks	3493
Packages	529

Top 10 Directories

Directory	Size

Category Breakdown

Category	Size	%
xbps packages	2650.8MB	74.5%
Python venv	591.8MB	16.6%
Firmware	11.2MB	.3%
Other	304.2MB	8.5%

Top 10 Packages by Size

Package	Size
mit-krb5-libs-1.21.3_1	270.4MB
gawk-5.3.2_1	210.3MB
llvm-21_3	141.5MB
libllvm21-21.1.8_1	134.6MB
libldns-1.9.2_1	124.3MB
pd-mapper-1.0_1	74MB
glib-2.88.3_1	67.4MB
gcc-14.2.1+20250405_4	66.6MB
libclang-cpp21-21.1.8_1	58.4MB
libcap-progs-2.78_1	56MB

Top 30 Files by Size

File	Size
/usr/lib/llvm/22/lib/libLLVM.so.22.1	134.5MB
/usr/lib/llvm/21/lib/libLLVM.so.21.1	124.3MB
/usr/lib/llvm/21/lib/libMLIR.so.21.1	89.7MB
/usr/lib/llvm/21/bin/mlir-transform-opt	82.9MB
/usr/lib/llvm/22/lib/libclang-cpp.so.22.1	58.4MB
/usr/lib/llvm/21/lib/libclang-cpp.so.21.1	56MB
/usr/lib/llvm/21/bin/mlir-translate	53.2MB
/usr/lib/llvm/21/bin/llvm-exegesis	52MB
/usr/lib/llvm/21/bin/llvm-bolt-binary-analysis	50.6MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/gnat1	40.1MB
/usr/bin/gdb	39.1MB
/usr/lib/libgallium-26.2.5.so	38.5MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1plus	37.3MB
/usr/lib/libRusticlOpenCL.so.1.0.0	35.5MB
/usr/lib/libllvm-qcom.so	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/lto1	33.9MB
/usr/bin/lto-dump	33.9MB
/usr/local/venv/bin/ruff	31.8MB
/usr/share/icu/78.3/icudt78l.dat	31.5MB
/usr/bin/uv	30.4MB
/usr/lib/llvm/21/lib/libclang.so.21.1.8	30.2MB
/usr/lib/libz3.so	28.8MB
/usr/lib/llvm/21/bin/c-index-test	28.6MB
/usr/local/venv/lib/python3.12/site-packages/gcc_arm_none_eabi/toolchain/libexec/gcc/arm-none-eabi/13.2.1/cc1	28.2MB
/usr/bin/run	26.7MB
/usr/local/venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-71e1b124.so	23.6MB
/usr/comma/updater	23.5MB
/usr/comma/setup	23.5MB
/usr/comma/reset	23.5MB