Gotta love Linux!

Wanted to install Arch on my Rasperry PI yesterday, but don't have a cardreader on my PC. Still had an SD with a different distro (RasPlex) lying around. Popped that in, connected power and ethernet only, looked up the default SSH credentials and got to a blinking terminal on my desktop PC.
Well, how am I gonna format my microSD? Rasplex comes without fdisk, and I booted it from the only microSD slot.
Well, here we go - Extracted arch to a usb thumb drive, chrooted into it, switched microSD cards, partitioned and formatted it from the USB-Arch, installed Arch on it, chrooted from Arch to Arch (😁), set up drivers, network and ssh access, rebooted to my why-the-hell-not distro.

Everything worked!