setup.py install and mercurial version requirement

sudo python3.8 setup.py install

........

Copying mbed_cli-1.10.2-py3.8.egg to /usr/local/lib/python3.8/dist-packages
mbed-cli 1.10.2 is already the active version in easy-install.pth
Installing mbed script to /usr/local/bin
Installing mbed-cli script to /usr/local/bin

Installed /usr/local/lib/python3.8/dist-packages/mbed_cli-1.10.2-py3.8.egg
Processing dependencies for mbed-cli==1.10.2
Searching for mercurial>=5.2
Reading https://pypi.org/simple/mercurial/
Download error on https://pypi.org/simple/mercurial/: [Errno 13] Permission denied -- Some packages may not be found!
Couldn't find index page for 'mercurial' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.org/simple/
Download error on https://pypi.org/simple/: [Errno 13] Permission denied -- Some packages may not be found!
No local packages or working download links found for mercurial>=5.2
error: Could not find suitable distribution for Requirement.parse('mercurial>=5.2')