Here are some other terminal commands you may find helpful, which I've gleaned from these forums or the Solus troubleshooting guidesโฆ
If trying to update over an unstable internet connection:
until sh -c 'sudo eopkg up -y';do echo "Trying again";done
And to identify then reinstall any broken packages from the Solus repo:
sudo eopkg check | grep Broken | awk '{print $4}' | xargs sudo eopkg it --reinstall