Installation fails, "could not make changes to the installed system"

Anyone know what might be causing this? I’m using the latest installer on a 1TB drive that i’m allowing to be wiped during install.

13:20:59 [1]: void Calamares::ViewManager::onInstallationFailed(const QString&, const QString&)
ERROR: Installation failed: “Package Manager error”
… - message: “Package Manager error”
… - details: The package manager could not make changes to the installed system. The command

pacman
returned error code 1.

Full log here:
https://termbin.com/ihoz

Should be fixed by:

Thanks so much Petr! Do I just re run the install to pick that up?

Correct, this will be automatically fetched from github!