ubuntu@xenial:/charms/layers/layer-calamari$ charm build
build: Composing into /charms
build: Processing layer: layer:basic
build: Processing layer: calamari
build: layer.yaml includes calmari which isn't used in metadata.yaml
build: Processing interface: http
Traceback (most recent call last):
  File "/usr/local/bin/charm-build", line 9, in <module>
    load_entry_point('charm-tools==1.11.2', 'console_scripts', 'charm-build')()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/__init__.py", line 579, in main
    build()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/__init__.py", line 466, in __call__
    self.generate()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/__init__.py", line 431, in generate
    self.exec_plan(self.plan, self.layers)
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/__init__.py", line 410, in exec_plan
    tactic()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/tactics.py", line 640, in __call__
    self._add(pip, wheelhouse, '-r', self.entity)
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/build/tactics.py", line 622, in _add
    reqs).throw_on_error()()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/utils.py", line 200, in __call__
    result.throw_on_error()
  File "/home/ubuntu/.local/lib/python2.7/site-packages/charmtools/utils.py", line 157, in throw_on_error
    self.exit_code, self.command, output=self.output)
subprocess.CalledProcessError: Command '(path(u'/tmp/tmpDBkRH9/bin/pip3'), 'install', '--no-binary', ':all:', '-d', path(u'/tmp/tmp23445v'), '-r', path(u'/charms/layers/layer-calamari/wheelhouse.txt'))' returned non-zero exit status 1