Dependency issues when compiling on jacinto6 plus board

[deepthi-lnt]

I am running the command
onhosted.orgevm:~/uptane# pip3 install --force-reinstall -r dev-requirements.txt --trusted-host pypi.org --trusted-host files.pythonhosted.org

The log is as below with pynacl failure please let me know how to sort it

Obtaining file:///home/root/uptane (from -r dev-requirements.txt (line 8))
Collecting canonicaljson==1.1.4 (from -r dev-requirements.txt (line 1))
Downloading https://files.pythonhosted.org/packages/59/8d/791b6b9a297a4ff982bb51e5d5248dbd4367215f1eeb5a97da51e70585c7/canonicaljsol
Collecting cffi==1.11.5 (from -r dev-requirements.txt (line 2))
Downloading https://files.pythonhosted.org/packages/e7/a7/4cd50e57cc6f436f1cc3a7e8fa700ff9b8b4d471620629074913e3735fb2/cffi-1.11.5.)
|################################| 440kB 32kB/s
Collecting cryptography==2.3 (from -r dev-requirements.txt (line 3))
Downloading https://files.pythonhosted.org/packages/79/a2/61c8625f96c8582d3053f89368c483ba62e56233d055e58e372f94a393f0/cryptography)
|################################| 450kB 99kB/s
Collecting pynacl==1.2.1 (from -r dev-requirements.txt (line 4))
Downloading https://files.pythonhosted.org/packages/08/19/cf56e60efd122fa6d2228118a9b345455b13ffe16a14be81d025b03b261f/PyNaCl-1.2.1)
|################################| 3.3MB 1.0MB/s
ERROR: Complete output from command python setup.py egg_info:
ERROR: Traceback (most recent call last):
File "/usr/lib/python3.5/urllib/request.py", line 1254, in do_open
h.request(req.get_method(), req.selector, req.data, headers)
File "/usr/lib/python3.5/http/client.py", line 1107, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
self.endheaders(body)
File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.5/http/client.py", line 934, in _send_output
self.send(msg)
File "/usr/lib/python3.5/http/client.py", line 877, in send
self.connect()
File "/usr/lib/python3.5/site-packages/setuptools/ssl_support.py", line 191, in connect
self.sock = ctx.wrap_socket(sock, server_hostname=actual_host)
File "/usr/lib/python3.5/ssl.py", line 385, in wrap_socket
_context=self)
File "/usr/lib/python3.5/ssl.py", line 760, in init
self.do_handshake()
File "/usr/lib/python3.5/ssl.py", line 996, in do_handshake
self._sslobj.do_handshake()
File "/usr/lib/python3.5/ssl.py", line 641, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:728)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 766, in open_url
    return open_with_auth(url, self.opener)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 961, in _socket_timeout
    return func(*args, **kwargs)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 1080, in open_with_auth
    fp = opener(request)
  File "/usr/lib/python3.5/urllib/request.py", line 466, in open
    response = self._open(req, data)
  File "/usr/lib/python3.5/urllib/request.py", line 484, in _open
    '_open', req)
  File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.5/site-packages/setuptools/ssl_support.py", line 161, in https_open
    lambda host, **kw: VerifyingHTTPSConn(host, self.ca_bundle, **kw), req
  File "/usr/lib/python3.5/urllib/request.py", line 1256, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:728)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-install-m0sfya43/pynacl/setup.py", line 251, in <module>
    "Programming Language :: Python :: 3.6",
  File "/usr/lib/python3.5/site-packages/setuptools/__init__.py", line 144, in setup
    _install_setup_requires(attrs)
  File "/usr/lib/python3.5/site-packages/setuptools/__init__.py", line 139, in _install_setup_requires
    dist.fetch_build_eggs(dist.setup_requires)
  File "/usr/lib/python3.5/site-packages/setuptools/dist.py", line 717, in fetch_build_eggs
    replace_conflicting=True,
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 782, in resolve
    replace_conflicting=replace_conflicting
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1065, in best_match
    return self.obtain(req, installer)
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1077, in obtain
    return installer(requirement)
  File "/usr/lib/python3.5/site-packages/setuptools/dist.py", line 784, in fetch_build_egg
    return cmd.easy_install(req)
  File "/usr/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 667, in easy_install
    not self.always_copy, self.local_index
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 655, in fetch_distribution
    dist = find(requirement)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 635, in find
    loc = self.download(dist.location, tmpdir)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 579, in download
    found = self._download_url(scheme.group(1), spec, tmpdir)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 824, in _download_url
    return self._attempt_download(url, filename)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 830, in _attempt_download
    headers = self._download_to(url, filename)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 729, in _download_to
    fp = self.open_url(url)
  File "/usr/lib/python3.5/site-packages/setuptools/package_index.py", line 780, in open_url
    % (url, v.reason))
distutils.errors.DistutilsError: Download error for https://files.pythonhosted.org/packages/93/1a/ab8c62b5838722f29f3daffcc8d4bd6)
----------------------------------------

ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-m0sfya43/pynacl/