I'm attempting to learn something of snap desktop packaging by repackaging unity-tweak-tool as a snap. I am finding the docs to be less than stellar, but so far I've got a snapcraft.yaml file that looks like this:

name: unity-tweak-tool version: 1 summary: configuration tool for the Unity desktop environment description: | Unity Tweak Tool is a settings manager for the Unity desktop. It provides users with a fast, simple and easy-to-use interface with which to access many useful and little known features and settings of the desktop environment that one may want to configure. apps: unity-tweak-tool: command: $SNAP/usr/bin/unity-tweak-tool plugs: [unity7] parts: unity-tweak-tool: plugin: python3 source: git://github.com/Seth-Johnson/unity-tweak-tool.git source-type: git build-packages: - python3-distutils-extra - python3-all - python3-dbus - python-dev stage-packages: - gir1.2-glib-2.0 - gir1.2-gtk-3.0 - python3-xdg - python3-cairo - unity-webapps-service

However when I run snapcraft snap setup.py always fails because several python modules are missing:

Running setup.py install for unity-tweak-tool ... error Complete output from command /home/sethj/projects/snappy-testing/parts/unity-tweak-tool/install/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-s6dwhgys-build/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r

', '

'), __file__, 'exec'))" install --record /tmp/pip-xxv1mi7p-record/install-record.txt --single-version-externally-managed --compile --home=/tmp/tmp2y5izah7: ERROR: Python module values not found ERROR: Python module apport not found ERROR: Python module apport.hookutils not found WARNING: syntax errors in notes/wizardry.py: Missing parentheses in call to 'print' (wizardry.py, line 9) ERROR: Python module dbus not found ERROR: Python module dbus.service not found ERROR: Python module dbus.mainloop.glib not found

(full output here)

I admit I'm not 100% sure I doing this properly, but as far as I can tell it should be building the packages listed under build-packages, which satisfy the build requirements for unity-tweak-tool.

Where am I going wrong?