Hello. I'm having trouble setting up a nixops libvirt instance. Basically, if I install anything newer than NixOS 19.09, I get the dreaded "cannot figure username" error, and if I install anything older than 19.09, postgres is unable to start due to something similar to https://github.com/NixOS/nixpkgs/issues/65556
#65556 (by pasqui23, 35 weeks ago, closed): postgresql service fail to start
Any ideas on how to get this VM running?
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