Log: # pamac upgrade Warning: Building packages as root Warning: Setting build directory to /var/cache/pamac Preparing... Cloning python-pynput build files... Running as unit: run-u335.service Finished with result: success Main processes terminated with: code=exited/status=0 Service runtime: 912ms …

You need to install this package from the AUR first. Dependencies on packages in the AUR are not automatically installed.