$ make run
Testing if derl runs with tests/test-directory (use args="" to pass arguments)
derl tests/test-directory 
Traceback (most recent call last):
  File "/home/travis/virtualenv/python3.7.6/bin/derl", line 11, in <module>
    load_entry_point('derl==0.0.post0.dev87+g17bf72d', 'console_scripts', 'derl')()
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/pkg_resources/__init__.py", line 490, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2854, in load_entry_point
    return ep.load()
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2445, in load
    return self.resolve()
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2451, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/derl-0.0.post0.dev87+g17bf72d-py3.7.egg/derl/main.py", line 14, in <module>
    from derl.dispatcher import run_loop
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/derl-0.0.post0.dev87+g17bf72d-py3.7.egg/derl/dispatcher.py", line 7, in <module>
    import asyncio
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/asyncio/__init__.py", line 21, in <module>
    from .base_events import *
  File "/home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages/asyncio/base_events.py", line 296
    future = tasks.async(future, loop=self)
                       ^
SyntaxError: invalid syntax
Makefile:60: recipe for target 'run' failed
make: *** [run] Error 1
The command "make run" exited with 2.

Using /home/travis/virtualenv/python3.7.6/lib/python3.7/site-packages
Finished processing dependencies for derl==0.0.post0.dev87+g17bf72d
writing list of installed files to 'files.log'
/home/travis/build/tpiekarski/derl/.eggs/PyScaffold-3.2.3-py3.7.egg/pyscaffold/contrib/setuptools_scm/git.py:68: UserWarning: "/home/travis/build/tpiekarski/derl" is shallow and may cause errors
  warnings.warn('"%s" is shallow and may cause errors' % (wd.path,))

Complete output from command /home/todde/dev/derl/.venv-tests/bin/python -u -c [...]
usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
    or: -c --help [cmd1 cmd2 ...]
    or: -c --help-commands
    or: -c cmd --help

error: invalid command 'bdist_wheel'

----------------------------------------
Failed building wheel for pyyaml
Running setup.py clean for pyyaml
Failed to build pyyaml