root@ubuntu:/snap/bin# git clone https://github.com/snapcraft-docs/offlineimap
Cloning into 'offlineimap'...
remote: Counting objects: 12845, done.
remote: Total 12845 (delta 0), reused 0 (delta 0), pack-reused 12845
Receiving objects: 100% (12845/12845), 5.34 MiB | 2.93 MiB/s, done.
Resolving deltas: 100% (8221/8221), done.
Checking connectivity... done.
root@ubuntu:/snap/bin# cd offlineimap/
root@ubuntu:/snap/bin/offlineimap# snapcraft
Preparing to pull offlineimap
Hit http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Hit http://ppa.launchpad.net/ansible/ansible/ubuntu xenial InRelease
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]
Fetched 306 kB in 0s (0 B/s)
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/python2.7-minimal_2.7.12-1ubuntu0~16.04.2_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libsqlite3-0_3.11.0-1ubuntu1_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/python2.7_2.7.12-1ubuntu0~16.04.2_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/mime-support_3.59ubuntu1_all.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/gcc-6-base_6.0.1-0ubuntu1_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/python_2.7.11-1_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libexpat1_2.1.0-7ubuntu0.16.04.3_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libpython-stdlib_2.7.11-1_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libpython2.7-minimal_2.7.12-1ubuntu0~16.04.2_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libffi6_3.2.1-4_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libpython2.7-stdlib_2.7.12-1ubuntu0~16.04.2_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/python-minimal_2.7.11-1_amd64.deb
Ignoring already existing file: /home/pipe-to-grep/.cache/snapcraft/stage-packages/apt/670c39dd26fe2ecb1a498279e172eabb8a105f84fb71de433d7e6e07850297e0ea0545e528ab73ba9c94d60676cde8b6/var/cache/apt/archives/libssl1.0.0_1.0.2g-1ubuntu4.10_amd64.deb
Pulling offlineimap
Fetching and installing pip...
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pip
  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
    100% |████████████████████████████████| 1.3MB 547kB/s
  Saved ./parts/offlineimap/python-packages/pip-9.0.1-py2.py3-none-any.whl
Successfully downloaded pip
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Ignoring indexes: https://pypi.python.org/simple
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pip
Installing collected packages: pip
Successfully installed pip-8.1.1
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Fetching and installing wheel...
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting wheel
  Downloading wheel-0.30.0-py2.py3-none-any.whl (49kB)
    100% |████████████████████████████████| 51kB 1.1MB/s
  Saved ./parts/offlineimap/python-packages/wheel-0.30.0-py2.py3-none-any.whl
Successfully downloaded wheel
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting wheel
Installing collected packages: wheel
Successfully installed wheel-0.30.0
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Fetching and installing setuptools...
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting setuptools
  Downloading setuptools-38.2.4-py2.py3-none-any.whl (489kB)
    100% |████████████████████████████████| 491kB 1.4MB/s
  Saved ./parts/offlineimap/python-packages/setuptools-38.2.4-py2.py3-none-any.whl
Successfully downloaded setuptools
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting setuptools
Installing collected packages: setuptools
Successfully installed setuptools-38.2.4
The directory '/home/pipe-to-grep/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/pipe-to-grep/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Processing /snap/bin/offlineimap/parts/offlineimap/src
  Link is a directory, ignoring download_dir
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-TXY_Md-build/setup.py", line 26, in <module>
        import offlineimap
      File "offlineimap/__init__.py", line 20, in <module>
        from offlineimap.init import OfflineImap
      File "offlineimap/init.py", line 34, in <module>
        from offlineimap import threadutil, accounts, folder, mbnames
      File "offlineimap/accounts.py", line 23, in <module>
        import six
    ImportError: No module named six

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-TXY_Md-build/
Traceback (most recent call last):
  File "/snap/snapcraft/924/bin/snapcraft", line 11, in <module>
    load_entry_point('snapcraft==2.37', 'console_scripts', 'snapcraft')()
  File "/snap/snapcraft/924/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 565, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/snap/snapcraft/924/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2631, in load_entry_point
    return ep.load()
  File "/snap/snapcraft/924/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2291, in load
    return self.resolve()
  File "/snap/snapcraft/924/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2297, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/cli/__main__.py", line 19, in <module>
    run(prog_name='snapcraft')
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 1043, in invoke
    return Command.invoke(self, ctx)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/cli/__init__.py", line 124, in run
    ctx.forward(lifecyclecli.commands['snap'])
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 553, in forward
    return self.invoke(cmd, **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/cli/lifecycle.py", line 140, in snap
    project_options, directory=directory, output=output)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_packer.py", line 45, in snap
    execute('prime', project_options)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 80, in execute
    _Executor(config, project_options).run(step, part_names)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 175, in run
    self._run_step(step, part, part_names)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 212, in _run_step
    getattr(part, step)()
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/pluginhandler/__init__.py", line 249, in pull
    self.plugin.pull()
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/plugins/python.py", line 190, in pull
    self._download_project()
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/plugins/python.py", line 271, in _download_project
    process_dependency_links=self.options.process_dependency_links)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/plugins/_python/_pip.py", line 241, in download
    self._python_package_dir] + args, cwd=cwd)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/plugins/_python/_pip.py", line 433, in _run
    **kwargs)
  File "/snap/snapcraft/924/lib/python3.6/site-packages/snapcraft/internal/common.py", line 63, in run
    subprocess.check_call(['/bin/sh', f.name] + cmd, **kwargs)
  File "/snap/snapcraft/924/usr/lib/python3.6/subprocess.py", line 291, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/bin/sh', '/tmp/tmp0fbeqf8d', '/snap/bin/offlineimap/parts/offlineimap/install/usr/bin/python2', '-m', 'pip', 'download', '--disable-pip-version-check', '--dest', '/snap/bin/offlineimap/parts/offlineimap/python-packages', '.']' returned non-zero exit status 1.