Launchpad LXD failure

Hello, with such snapcraft.yaml :

name: opendungeons-plus
version: "0.8.0"
summary: OpenDungeonsPlus – enhanced fork
description: |
  A dungeon management game inspired by Dungeon Keeper, Overlord 
  and Evil Genius. Enhanced fork with upgraded editor and engine.

grade: devel
confinement: devmode
base: core22
compression: lzo
architectures:
  - build-on: amd64

apps:
  opendungeons-plus:
    command: usr/bin/opendungeons-plus
    plugs:
      - opengl
      - audio-playback
      - joystick
      - network
      - network-bind
      - home
      - removable-media
      - x11
      - desktop
      - desktop-legacy
      - wayland
      - pulseaudio
    environment:
      ALSOFT_DRIVERS: pulse
      LD_LIBRARY_PATH: "${SNAP}/usr/lib:${SNAP}/usr/lib/${SNAPCRAFT_ARCH_TRIPLET}:${SNAP}/usr/lib/openal:${SNAP}/usr/lib/cegui-0.9999:${LD_LIBRARY_PATH}"   # ← FIX (compressed to valid form)
      OGRE_PLUGIN_DIR: "${SNAP}/usr/lib/OGRE"
      OGRE_CONFIG_DIR: "${SNAP}/usr/share/OGRE"
      CEGUI_DIR: "${SNAP}/usr"
      XDG_DATA_DIRS: "${SNAP}/usr/share:/usr/share"
      XDG_DATA_HOME: "${SNAP_USER_DATA}"
      XDG_CONFIG_HOME: "${SNAP_USER_DATA}"
      CEGUI_MODULE_DIR: "$SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/cegui-0.9999"
      DISPLAY: :0
      ALSOFT_LOGLEVEL: 3
      OGRE_RTSHADER_CACHE_DIR: "$SNAP_USER_DATA/shaderCache"
    extensions: [gnome]

    
parts:

  ######################################################################
  # OIS 1.5.1
  ######################################################################
  libois:
    plugin: cmake
    source: https://github.com/wgois/OIS.git
    source-tag: v1.5.1
    source-depth: 1
    cmake-parameters:
      - -DCMAKE_BUILD_TYPE=Release
      - -DCMAKE_INSTALL_PREFIX=/usr
    build-packages:
      - libx11-dev

  ######################################################################
  # OGRE 13.6.5
  ######################################################################
  ogre:
    plugin: cmake
    source: https://github.com/OGRECave/ogre.git
    source-tag: v13.6.5
    source-depth: 1

    cmake-parameters:
      - -DCMAKE_BUILD_TYPE=Debug
      - -DOGRE_CONFIG_THREAD_PROVIDER=std
      - -DOGRE_CONFIG_THREADS=3
      - -DOGRE_STATIC=FALSE
      - -DOGRE_BUILD_DEPENDENCIES=FALSE

      # render systems
      - -DOGRE_BUILD_RENDERSYSTEM_GL3PLUS=TRUE
      - -DOGRE_BUILD_RENDERSYSTEM_GLES2=FALSE
      - -DOGRE_BUILD_RENDERSYSTEM_GL=FALSE
      - -DOGRE_GLSUPPORT_USE_EGL=FALSE

      # disable unused plugins
      - -DOGRE_BUILD_TOOLS=FALSE
      - -DOGRE_BUILD_SAMPLES=FALSE
      - -DOGRE_BUILD_PLUGIN_FREEIMAGE=FALSE
      - -DOGRE_BUILD_PLUGIN_EXRCODEC=FALSE
      - -DOGRE_BUILD_PLUGIN_BSP=FALSE
      - -DOGRE_BUILD_PLUGIN_PCZ=FALSE
      - -DOGRE_BUILD_PLUGIN_DOT_SCENE=FALSE

      # disable heavy components
      - -DOGRE_BUILD_COMPONENT_JAVA=FALSE
      - -DOGRE_BUILD_COMPONENT_VOLUME=FALSE
      - -DOGRE_BUILD_COMPONENT_PAGING=FALSE
      - -DOGRE_BUILD_COMPONENT_TERRAIN=FALSE
      - -DOGRE_BUILD_COMPONENT_PROPERTY=FALSE
      - -DOGRE_BUILD_COMPONENT_MESHLODGENERATOR=FALSE
      - -DOGRE_BUILD_COMPONENT_HLMS=FALSE

      - -DCMAKE_INSTALL_PREFIX=/usr
      - -DOGRE_ENABLE_PRECOMPILED_HEADERS=OFF

    build-packages:
      - libxrandr-dev
      - libfreetype6-dev
      - libgl1-mesa-dev
      - libglu1-mesa-dev
      - g++

    stage-packages:
      - libfreetype6
      - libgl1
      - libxrandr2
      - libegl1

    after: [libois]

  ######################################################################
  # CEGUI — FIXED to disable OpenGLES + libxml2 parser
  ######################################################################
  cegui:
    plugin: cmake
    source: https://github.com/tomluchowski/cegui.git
    source-tag: scissors_test_disabled
    source-depth: 1

    cmake-parameters:
      - -DCMAKE_BUILD_TYPE=Debug
      - -DCMAKE_INSTALL_PREFIX=/usr
      - -DCMAKE_CXX_FLAGS=-std=c++11

      # Correct multiarch installation
      - -DINSTALL_LIB_DIR=lib/${SNAPCRAFT_ARCH_TRIPLET}
      - -DINSTALL_PKGCONFIG_DIR=lib/${SNAPCRAFT_ARCH_TRIPLET}/pkgconfig
      - -DINSTALL_INCLUDE_DIR=include/cegui-0
      - -DINSTALL_DATA_DIR=share/cegui-0

      # Renderers: only OGRE
      - -DCEGUI_BUILD_RENDERER_OGRE=ON
      - -DCEGUI_BUILD_RENDERER_OPENGL=OFF
      - -DCEGUI_BUILD_RENDERER_OPENGL3=OFF
      - -DCEGUI_BUILD_RENDERER_OPENGLES=OFF
      - -DCEGUI_BUILD_RENDERER_OPENGLES2=OFF     # ← FIX
      - -DCEGUI_BUILD_RENDERER_OPENGLES3=OFF     # ← FIX

      # XML parsers
      - -DCEGUI_BUILD_XMLPARSER_EXPAT=ON
      - -DCEGUI_BUILD_XMLPARSER_LIBXML2=OFF      # ← FIX

      # Disable samples and unused codecs
      - -DCEGUI_SAMPLES_ENABLED=OFF
      - -DCEGUI_BUILD_IMAGECODEC_FREEIMAGE=OFF
      - -DCEGUI_INSTALL_DEV_HEADERS=ON

    build-packages:
      - librapidxml-dev
      - libexpat1-dev

    build-environment:
      - CMAKE_PREFIX_PATH: "$SNAPCRAFT_STAGE/usr"
      - CMAKE_INCLUDE_PATH: "$SNAPCRAFT_STAGE/usr/include"
      - CMAKE_LIBRARY_PATH: "$SNAPCRAFT_STAGE/usr/lib/${SNAPCRAFT_ARCH_TRIPLET}"
      - PKG_CONFIG_PATH: "$SNAPCRAFT_STAGE/usr/lib/${SNAPCRAFT_ARCH_TRIPLET}/pkgconfig"

    override-build: |
      snapcraftctl build
      # (your install path patching logic kept unchanged)
      LIB64="$SNAPCRAFT_PART_INSTALL/usr/lib64"
      LIBTRIPLET="$SNAPCRAFT_PART_INSTALL/usr/lib/${SNAPCRAFT_ARCH_TRIPLET}"
      if [ -d "$LIB64" ]; then
        mkdir -p "$LIBTRIPLET"
        mv "$LIB64"/* "$LIBTRIPLET"/ 2>/dev/null || true
        rm -rf "$LIB64"
      fi

    after: [ogre]

  ########################################################################
  # SFML 2.5.1 (AUDIO ENABLED, PULSEAUDIO DISABLED)
  ########################################################################
  sfml:
    plugin: cmake
    source: https://github.com/SFML/SFML.git
    source-tag: 2.5.1
    source-depth: 1

    cmake-parameters:
      - -DCMAKE_BUILD_TYPE=Release
      - -DCMAKE_INSTALL_PREFIX=/usr
      - -DBUILD_SHARED_LIBS=ON

      # Enable audio (required by OpenDungeons)
      - -DSFML_BUILD_AUDIO=ON

      # Disable PulseAudio backend completely
      - -DSFML_USE_PULSE=FALSE

      # Force OpenAL audio backend only
      - -DSFML_USE_OPENAL=TRUE

      # Enable needed modules
      - -DSFML_BUILD_GRAPHICS=ON
      - -DSFML_BUILD_WINDOW=ON
      - -DSFML_BUILD_SYSTEM=ON
      - -DSFML_BUILD_NETWORK=ON

      # Disable examples
      - -DSFML_BUILD_EXAMPLES=OFF

    build-packages:
      - libopenal-dev
      - libflac-dev
      - libvorbis-dev
      - libogg-dev
      - libfreetype6-dev
      - libx11-dev
      - libxrandr-dev
      - libudev-dev
      - libjpeg-dev
      - libpng-dev
      - libxcb1-dev
      - libxcb-image0-dev
      - libxcb-render0-dev
      - libxcb-shm0-dev
      - libxcb-icccm4-dev
      - libgl1-mesa-dev
      - mesa-common-dev

    stage-packages:
      - libopenal1
      - libflac8
      - libvorbis0a
      - libvorbisenc2
      - libvorbisfile3
      - libogg0
      - libfreetype6

    after: [ogre]


  ######################################################################
  # OpenDungeonsPlus
  ######################################################################
  opendungeons-plus:
    plugin: cmake
    source: https://github.com/tomluchowski/OpenDungeonsPlus.git
    source-tag: shaders-improvement
    source-depth: 1


    cmake-parameters:
      - -DOD_USE_SFML_WINDOW=FALSE
      - -DCMAKE_BUILD_TYPE=Debug
      - -DCMAKE_INSTALL_PREFIX=/usr/
      - -DOD_TREAT_WARNINGS_AS_ERRORS=OFF
      - "-DOGRE_DIR=$SNAPCRAFT_STAGE/usr/lib/OGRE/cmake"
      - "-DCEGUI_DIR=$SNAPCRAFT_STAGE/usr"
      - "-DOIS_DIR=$SNAPCRAFT_STAGE/usr"
      - "-DCMAKE_PREFIX_PATH=$SNAPCRAFT_STAGE/usr"




    build-environment:
      - CMAKE_PREFIX_PATH: "$SNAPCRAFT_STAGE/usr"
      - CMAKE_INCLUDE_PATH: "$SNAPCRAFT_STAGE/usr/include"
      - CMAKE_LIBRARY_PATH: "$SNAPCRAFT_STAGE/usr/lib"
      - PKG_CONFIG_PATH: "$SNAPCRAFT_STAGE/usr/lib/pkgconfig"

    build-packages:
      - pkg-config
      - libboost-thread-dev
      - libboost-locale-dev
      - libboost-filesystem-dev
      - libboost-program-options-dev
      - libpython3.10-dev
      - python3-distutils
      - python3-distutils-extra
      - pybind11-dev
      - gdb
    stage-packages:
      - gdb
      - libc6-dbg
      - libboost-thread1.74.0
      - libboost-program-options1.74.0
      - libboost-filesystem1.74.0
      - libboost-system1.74.0
      - libboost-locale1.74.0
      - libboost-chrono1.74.0
      - python3
      - libpython3.10

    override-build: |
      snapcraftctl build

      # Move binary into /usr/bin
      install -Dm755 $SNAPCRAFT_PART_INSTALL/usr/games/opendungeons-plus \
                     $SNAPCRAFT_PART_INSTALL/usr/bin/opendungeons-plus
    override-prime: |
      snapcraftctl prime

      # OpenDungeons config directory
      odcfg="$SNAPCRAFT_PRIME/etc/opendungeons-plus"

      # Patch plugins.cfg actually used by the game
      if [ -f "$odcfg/plugins.cfg" ]; then
        sed -i \
          -e 's|/root/stage/usr/lib|/usr/lib|g' \
          -e 's|/root/stage||g' \
          "$odcfg/plugins.cfg"
      fi

      # Patch resources.cfg used by the game
      odres="$SNAPCRAFT_PRIME/usr/share/games/opendungeons-plus/resources.cfg"
      if [ -f "$odres" ]; then
        sed -i \
          -e 's|/root/stage/usr/share/OGRE/Media/RTShaderLib|/usr/share/OGRE/Media/RTShaderLib|g' \
          -e 's|/root/stage/usr/share/OGRE/Media/Main|/usr/share/OGRE/Media/Main|g' \
          "$odres"
      fi

    # Assets
    organize:
      models: usr/share/opendungeons-plus/models
      materials: usr/share/opendungeons-plus/materials
      shaders: usr/share/opendungeons-plus/shaders
      levels: usr/share/opendungeons-plus/levels
      sounds: usr/share/opendungeons-plus/sounds
      music: usr/share/opendungeons-plus/music
      gui: usr/share/opendungeons-plus/gui
      config: usr/share/opendungeons-plus/config

    after: [ogre, cegui, libois, sfml]

I get such result :


https://launchpad.net/~build.snapcraft.io/+snap/cf6b844bff09ca3dfd13ebcdb618f3fb/+build/2996518
[Thu Dec 18 11:34:43 2025]
RUN: /usr/share/launchpad-buildd/bin/builder-prep 
Kernel version: Linux lcy02-amd64-085 6.8.0-90-generic #91-Ubuntu SMP PREEMPT_DYNAMIC Tue Nov 18 14:14:30 UTC 2025 x86_64
Buildd toolchain package versions: launchpad-buildd_260~778~ubuntu24.04.1 python3-lpbuildd_260~778~ubuntu24.04.1 sbuild_0.85.10ubuntu0.2 git-build-recipe_0.3.7 git_1:2.43.0-1ubuntu7.3 dpkg-dev_1.22.6ubuntu6.5 python3-debian_0.1.49ubuntu2.
Syncing the system clock with the buildd NTP service...
2025-12-18 11:34:43.844704 (+0000) -0.007415 +/- 0.000942 ntp.buildd 10.131.248.1 s3 no-leap
[Thu Dec 18 11:34:43 2025]
RUN: /usr/share/launchpad-buildd/bin/in-target unpack-chroot --backend=lxd --series=jammy --abi-tag=amd64 --isa-tag=amd64 SNAPBUILD-2996518 --image-type lxd /home/buildd/filecache-default/a5cea9b5b487c27ef223c5de9108e78eb53b0070
Creating target for build SNAPBUILD-2996518
To start your first container, try: lxc launch ubuntu:24.04
Or for a virtual machine: lxc launch ubuntu:24.04 --vm

/usr/lib/python3/dist-packages/pylxd/models/operation.py:76: UserWarning: Attempted to set unknown attribute "location" on instance of "Operation"
  warnings.warn(
[Thu Dec 18 11:34:59 2025]
RUN: /usr/share/launchpad-buildd/bin/in-target mount-chroot --backend=lxd --series=jammy --abi-tag=amd64 --isa-tag=amd64 SNAPBUILD-2996518
Starting target for build SNAPBUILD-2996518
/usr/lib/python3/dist-packages/pylxd/models/_model.py:134: UserWarning: Attempted to set unknown attribute "project" on instance of "Profile"
  warnings.warn(
/usr/lib/python3/dist-packages/pylxd/models/operation.py:76: UserWarning: Attempted to set unknown attribute "location" on instance of "Operation"
  warnings.warn(
Error: Instance is not running
/usr/lib/python3/dist-packages/pylxd/models/_model.py:134: UserWarning: Attempted to set unknown attribute "type" on instance of "Container"
  warnings.warn(
/usr/lib/python3/dist-packages/pylxd/models/_model.py:134: UserWarning: Attempted to set unknown attribute "project" on instance of "Container"
  warnings.warn(
Error: Instance is not running
Error: Instance is not running
Error: Instance is not running
cannot confirm that parent process is alive: Operation not permitted
cannot send command 0 to helper process: Broken pipe
Traceback (most recent call last):
  File "/usr/share/launchpad-buildd/bin/in-target", line 20, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/share/launchpad-buildd/bin/in-target", line 16, in main
    return args.operation.run()
           ^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/lpbuildd/target/lifecycle.py", line 36, in run
    self.backend.start()
  File "/usr/lib/python3/dist-packages/lpbuildd/target/lxd.py", line 619, in start
    self.run(
  File "/usr/lib/python3/dist-packages/lpbuildd/target/lxd.py", line 736, in run
    subprocess.check_call(cmd, **kwargs)
  File "/usr/lib/python3.12/subprocess.py", line 413, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['lxc', 'exec', 'lp-jammy-amd64', '--', 'linux64', 'mknod', '-m', '0660', '/dev/dm-0', 'b', '252', '0']' returned non-zero exit status 1.

Locally, on my machine I can build and everything bells and whistles. What shell I do next to get the newest build of opendungeons-plus on snapcraft ?