0.26.1 silo fails to start u8

The 0.26.1 silo fails to start u8 on arm64/m10

[2017-02-03 12:45:52.623316] mirplatform: Found graphics driver: mir:android (version 0.26.1)
Warning: ignoring unrecognised arguments: --vt 1
[2017-02-03 12:45:52.626284] mirserver: Starting
[2017-02-03 12:45:52.626619] mircommon: Loading modules from: /usr/lib/aarch64-linux-gnu/mir/server-platform
[2017-02-03 12:45:52.626809] mircommon: Loading module: /usr/lib/aarch64-linux-gnu/mir/server-platform/graphics-android.so.11
[2017-02-03 12:45:52.626925] mircommon: Loading module: /usr/lib/aarch64-linux-gnu/mir/server-platform/input-evdev.so.6
[2017-02-03 12:45:52.630768] mirplatform: Found graphics driver: mir:android (version 0.26.1)
[2017-02-03 12:45:52.631224] mirserver: Selected driver: mir:android (version 0.26.1)
[2017-02-03 12:45:52.773095] android/server: Found 1 matching egl configs
[2017-02-03 12:45:52.773199] android/server: Android visual ID for selected display format : 1
[2017-02-03 12:45:52.773232] android/server: Selected Mir display format : 1
[2017-02-03 12:45:52.797265] mirserver: Using software cursor
[2017-02-03 12:45:52.821213] mircommon: Loading modules from: /usr/lib/aarch64-linux-gnu/mir/server-platform
[2017-02-03 12:45:52.821416] mircommon: Loading module: /usr/lib/aarch64-linux-gnu/mir/server-platform/graphics-android.so.11
[2017-02-03 12:45:52.821559] mircommon: Loading module: /usr/lib/aarch64-linux-gnu/mir/server-platform/input-evdev.so.6
[2017-02-03 12:45:52.889197] mirserver: Selected input driver: mir:evdev-input (version: 0.26.1)
GL_VENDOR = ARM
GL_RENDERER = Mali-T720
GL_VERSION = OpenGL ES 2.0 (OpenGL ES 3.1)
dm_connection_start
[2017-02-03 12:45:52.950439] GLRenderer: EGL vendor: Android
[2017-02-03 12:45:52.950554] GLRenderer: EGL version: 1.4 Android META-EGL
[2017-02-03 12:45:52.950589] GLRenderer: EGL client APIs: OpenGL_ES
[2017-02-03 12:45:52.950627] GLRenderer: GL vendor: ARM
[2017-02-03 12:45:52.950665] GLRenderer: GL renderer: Mali-T720
[2017-02-03 12:45:52.950697] GLRenderer: GL version: OpenGL ES 2.0 (OpenGL ES 3.1)
[2017-02-03 12:45:52.950727] GLRenderer: GLSL version: OpenGL ES GLSL ES 3.10
[2017-02-03 12:45:52.950772] GLRenderer: GL max texture size = 8192
[2017-02-03 12:45:52.950813] GLRenderer: GL framebuffer bits: RGBA=8888, depth=0, stencil=0
[2017-02-03 12:45:52.967116] mirserver: Mir version 0.26.1
[2017-02-03 12:45:53.268969] evdev-input: Added /dev/input/event1
[2017-02-03 12:45:53.283988] evdev-input: Added /dev/input/event0
[2017-02-03 12:45:53.298163] evdev-input: Added /dev/input/event2
[2017-02-03 12:45:53.312111] evdev-input: Added /dev/input/event3
[2017-02-03 12:45:53.326919] mirserver: Initial display configuration:
[2017-02-03 12:45:53.327062] mirserver: Output 1: LVDS connected, used
[2017-02-03 12:45:53.327116] mirserver: Physical size 10.0" 135x216mm
[2017-02-03 12:45:53.327148] mirserver: Power is on
[2017-02-03 12:45:53.327182] mirserver: Current mode 1200x1920 57.07Hz
[2017-02-03 12:45:53.327215] mirserver: Preferred mode 1200x1920 57.07Hz
[2017-02-03 12:45:53.327246] mirserver: Orientation normal
[2017-02-03 12:45:53.327287] mirserver: Logical size 1200x1920
[2017-02-03 12:45:53.327319] mirserver: Logical position +0+0
[2017-02-03 12:45:53.327350] mirserver: Output 2: DisplayPort disconnected
[2017-02-03 12:45:53.327381] mirserver: Output 3: Virtual disconnected
set_active_session 'session-0'
Opening session Failed to connect: not accepted by server
Opening session phablet@ubuntu-phablet:~$

and U8's log
[2017-02-03:12:45:58.958] qtmir.screens: ScreensModel::ScreensModel
[2017-02-03 12:45:58.996999] mirplatform: Found graphics driver: mir:android (version 0.26.1)
[2017-02-03 12:45:59.001151] mirserver: Starting
[2017-02-03:12:45:59.007] Exception while creating graphics platform
ERROR: /build/mir-WwlJhU/mir-0.26.1+16.04.20170203.1/src/server/graphics/nested/mir_client_host_connection.cpp(321): Throw in function mir::graphics::nested::MirClientHostConnection::MirClientHostConnection(const string&, const string&, const std::shared_ptr<mir::shell::HostLifecycleEventListener>&)
Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >
std::exception::what: Nested Mir Platform Connection Error: Failed to connect: not accepted by server

initctl: No such variable: UNITY_MIR_SOCKET
[2017-02-03:12:46:25.215] qtmir.screens: ScreensModel::ScreensModel
[2017-02-03 12:46:25.232583] mirplatform: Found graphics driver: mir:android (version 0.26.1)
[2017-02-03 12:46:25.236253] mirserver: Starting
[2017-02-03:12:46:25.241] Exception while creating graphics platform
ERROR: /build/mir-WwlJhU/mir-0.26.1+16.04.20170203.1/src/server/graphics/nested/mir_client_host_connection.cpp(321): Throw in function mir::graphics::nested::MirClientHostConnection::MirClientHostConnection(const string&, const string&, const std::shared_ptr<mir::shell::HostLifecycleEventListener>&)
Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >
std::exception::what: Nested Mir Platform Connection Error: Failed to connect: not accepted by server

initctl: No such variable: UNITY_MIR_SOCKET