system.stateVersion

#1

When, if ever, does this need to be changed. I installed 18.09, but have upgraded to nixos-19.03. Would now be a good time to change the stateVersion from 18.09 to 19.03?

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#2

Same as When should I change system.stateVersion?
Basically: Read the release notes and don’t change it until the release note explicitly tell you to do so.

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#3

So, essentially, never?

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#4

Yep.
You basically set it once when you’re installing a completely new system and practically never change it.

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