mazelib: Unable to install with PIP

Every single time i try to install mazelib I get this error:

---

  ERROR: Failed building wheel for numpy
  ERROR: Command errored out with exit status 1:
   command: /usr/local/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-wheel-x7r47qyy/numpy/setup.py'"'"'; __file__='"'"'/tmp/pip-wheel-x7r47qyy/numpy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' clean --all
       cwd: /tmp/pip-wheel-x7r47qyy/numpy
  Complete output (10 lines):
  Running from numpy source directory.

  `setup.py clean` is not supported, use one of the following instead:

    - `git clean -xdf` (cleans all files)
    - `git clean -Xdf` (cleans all versioned files, doesn't touch
                        files that aren't checked into the git repo)

  Add `--force` to your command to use it anyway if you must (unsupported).

  ----------------------------------------
  ERROR: Failed cleaning build dir for numpy
ERROR: Failed to build one or more wheels
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/setuptools/installer.py", line 128, in fetch_build_egg
    subprocess.check_call(cmd)
  File "/usr/local/lib/python3.9/subprocess.py", line 372, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/usr/local/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmp3z9slaw0', '--quiet', 'numpy<=1.16.4,>=1.13.1']' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-install-5rn16r9y/mazelib/setup.py", line 60, in <module>
    setup(
  File "/usr/local/lib/python3.9/site-packages/setuptools/__init__.py", line 143, in setup
    _install_setup_requires(attrs)
  File "/usr/local/lib/python3.9/site-packages/setuptools/__init__.py", line 138, in _install_setup_requires
    dist.fetch_build_eggs(dist.setup_requires)
  File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 718, in fetch_build_eggs
    resolved_dists = pkg_resources.working_set.resolve(
  File "/usr/local/lib/python3.9/site-packages/pkg_resources/__init__.py", line 781, in resolve
    dist = best[req.key] = env.best_match(
  File "/usr/local/lib/python3.9/site-packages/pkg_resources/__init__.py", line 1066, in best_match
    return self.obtain(req, installer)
  File "/usr/local/lib/python3.9/site-packages/pkg_resources/__init__.py", line 1078, in obtain
    return installer(requirement)
  File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 777, in fetch_build_egg
    return fetch_build_egg(self, req)
  File "/usr/local/lib/python3.9/site-packages/setuptools/installer.py", line 130, in fetch_build_egg
    raise DistutilsError(str(e))
distutils.errors.DistutilsError: Command '['/usr/local/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmp3z9slaw0', '--quiet', 'numpy<=1.16.4,>=1.13.1']' returned non-zero exit status 1.
----------------------------------------

ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

It is preceded with a big chunk of gcc debug information. Impossible to paste everything here. I used the default docker Python image to assure it can be reproduced. Just get a shell inside the running image and run:

> pip install Cython (flawless)
> pip install NumPy (flawless)
> pip install mazelib (error)