ran into same dep error, do `pip install portio`. then simply extract the deb package with whatever (i use debtap) and run the executable with python3 (python2 doesn't work obviously).
laptop : y520
system : arch
further contact on twitter (@kkYrusobad) if u encounter more hiccups.
edit : ran into problem while starting EC, `pip` installs the module for current $USER. so run `pip install portio` as root because EC is going to ask for superuser permissions once its running and portio must be installed for user `root`. finally, working as a charm.