docker-build.sh fails

Docker build fails with the error below. Looks like something is outdated. By changing base image to ubuntu:xenial in the Dockerfile i could get it to build and run yotta --version in the running container, unsure if that has other implications though.

The original error message from docker-build.sh:

Collecting pyOCD<1.0,>=0.3 (from valinor<1.0,>=0.0.0->yotta==0.16.4)
Downloading https://files.pythonhosted.org/packages/89/03/ba2b7c7573b384a92981a6a199abd88a688df7f2dbbee1eea872366b84c0/pyOCD-0.12.0.tar.gz (838kB)
Complete output from command python setup.py egg_info:
zip_safe flag not set; analyzing archive contents...
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-install-3Nkkl_/pyOCD/setup.py", line 78, in
include_package_data=True, # include files from MANIFEST.in
File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 239, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 264, in fetch_build_eggs
replace_conflicting=True
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 620, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 858, in best_match
return self.obtain(req, installer) # try and download/install
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 870, in obtain
return installer(requirement)
File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 314, in fetch_build_egg
return cmd.easy_install(req)
File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 616, in easy_install
return self.install_item(spec, dist.location, tmpdir, deps)
File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 646, in install_item
dists = self.install_eggs(spec, download, tmpdir)
File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 834, in install_eggs
return self.build_and_install(setup_script, setup_base)
File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1040, in build_and_install
self.run_setup(setup_script, setup_base, args)
File "/usr/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 1025, in run_setup
run_setup(setup_script, args)
File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 50, in run_setup
lambda: execfile(
File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 100, in run
return func()
File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 52, in
{'__file__':setup_script, '__name__':'__main__'}
File "setup.py", line 34, in
])
File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 243, in __init__
_Distribution.__init__(self,attrs)
File "/usr/lib/python2.7/distutils/dist.py", line 287, in __init__
self.finalize_options()
File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 277, in finalize_options
ep.load()(self, ep.name, value)
File "build/bdist.linux-x86_64/egg/setuptools_scm/integration.py", line 10, in version_keyword
File "build/bdist.linux-x86_64/egg/setuptools_scm/version.py", line 66, in _warn_if_setuptools_outdated
setuptools_scm.version.SetuptoolsOutdatedWarning: your setuptools is too old (<12)

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-3Nkkl_/pyOCD/
/usr/local/lib/python2.7/dist-packages/pip-18.1-py2.7.egg/pip/_vendor/urllib3/util/ssl_.py:160: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecurePlatformWarning
The command '/bin/sh -c pip install -U pyopenssl ndg-httpsclient pyasn1 requests[security] yotta==0.16.4' returned a non-zero code: 1

Start with docker-build.sh and the Dockerfile, then inspect the pip install command and the reported setuptools error. Rebuild the image while checking the base image and dependency installation, and verify completion by running yotta --version in the container.

Written by the indexing model from the issue text.