>>> flutter-engine 3.19.5 Extracting
gzip -d -c /home/buildroot/instance-0/dl/flutter-engine/flutter-3.19.5.tar.gz | tar --strip-components=1 -C /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5  -xf -
>>> flutter-engine 3.19.5 Patching

Applying 0001-disable-pre-canned-sysroot.patch using patch: 
patching file build/config/sysroot.gni

Applying 0002-remove-explicit-x11-dependency.patch using patch: 
patching file flutter/shell/platform/linux/config/BUILD.gn

Applying 0003-fix-toolchain-paths.patch using patch: 
patching file build/toolchain/custom/BUILD.gn

Applying 0004-pkg-config.py-do-not-prepend-sysroot-path.patch using patch: 
patching file build/config/linux/pkg-config.py

Applying 0005-skip-configuration-dependency-if-unit-tests-are-disa.patch using patch: 
patching file flutter/testing/BUILD.gn
>>> flutter-engine 3.19.5 Configuring
/bin/sed -i -e "s%vulkan_use_x11.*%vulkan_use_x11 = false%g" -i /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5/build_overrides/vulkan_headers.gni
/bin/sed -i -e "s%ozone_platform_x11.*%ozone_platform_x11 = false%g" /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5/build/config/BUILDCONFIG.gn
cd /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5 && rm -rf /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5/out/linux_release_arm64 && PATH=/home/buildroot/instance-0/output-1/host/share/depot_tools:"/home/buildroot/instance-0/output-1/host/bin:/home/buildroot/instance-0/output-1/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" PUB_CACHE=/home/buildroot/instance-0/dl/br-flutter-pub-cache HOME=/home/buildroot/instance-0/output-1/host/share/flutter/sdk ./flutter/tools/gn --clang --embedder-for-target --linux-cpu arm64 --no-build-embedder-examples --no-clang-static-analyzer --no-enable-unittests --no-goma --no-prebuilt-dart-sdk --no-stripped --runtime-mode release --target-os linux --target-sysroot /home/buildroot/instance-0/output-1/host/aarch64-buildroot-linux-gnu/sysroot --target-toolchain /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5/buildtools/linux-x64/clang --target-triple aarch64-unknown-linux-gnu --no-lto --enable-fontconfig --enable-impeller-opengles --build-glfw-shell --enable-vulkan --enable-impeller-vulkan
ERROR Unresolved dependencies.
//flutter/shell/platform/glfw:flutter_glfw(//build/toolchain/custom:custom)
  needs //flutter/shell/platform/linux/config:x11(//build/toolchain/custom:custom)

Generating GN files in: out/linux_release_arm64
make: *** [package/pkg-generic.mk:273: /home/buildroot/instance-0/output-1/build/flutter-engine-3.19.5/.stamp_configured] Error 1
make: Leaving directory '/home/buildroot/instance-0/buildroot'