Unable to install cert tools

I am trying to install cert tools in vagrant ubuntu 18.04 box using python virtual env. Getting below errors.

Building wheels for collected packages: cert-tools, pycoin Running setup.py bdist_wheel for cert-tools … error Complete output from command /home/vagrant/cert-tools/env/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-na1ld5_f-build/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” bdist_wheel -d /tmp/tmpsg0094qlpip-wheel- --python-tag cp36: /usr/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: ‘long_description_content_type’ warnings.warn(msg) 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 cert-tools Running setup.py clean for cert-tools Running setup.py bdist_wheel for pycoin … error Complete output from command /home/vagrant/cert-tools/env/bin/python3 -u -c “import setuptools, tokenize;file=’/tmp/pip-build-dmcye581/pycoin/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” bdist_wheel -d /tmp/tmp3tjqwh19pip-wheel- --python-tag cp36: /usr/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: ‘long_description_content_type’ warnings.warn(msg) 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 pycoin Running setup.py clean for pycoin Failed to build cert-tools pycoin Installing collected packages: pycoin Found existing installation: pycoin 0.0.0 Uninstalling pycoin-0.0.0: Successfully uninstalled pycoin-0.0.0 Running setup.py install for pycoin … done Successfully installed pycoin-0.0.0 (env) vagrant@ubuntu1804:~/cert-tools$ vi setup.py (env) vagrant@ubuntu1804:~/cert-tools$ vi requirements.txt (env) vagrant@ubuntu1804:~/cert-tools$ ls
cert_tools conf.ini conf_v3.ini docs env LICENSE MANIFEST.in README.md release_package.sh requirements.txt run_tests.sh sample_data setup.py tests tox.ini
(env) vagrant@ubuntu1804:~/cert-tools$

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Here are the commands I used:
sudo apt-get install python3-venv
git clone https://github.com/blockchain-certificates/cert-tools.git && cd cert-tools
cd cert-tools
python3 -m venv env
source env/bin/activate
pip install .

Appreciate your help.