lix/doc/manual/rl-next/eval-system.md
eldritch horrors 7614aa9797 Merge pull request #4093 from matthewbauer/eval-system
Add eval-system option

(cherry picked from commit 071dbbee33af9f27338c3e53e4ea067dbfa14010)
Change-Id: Ia81358c8cfb60241da07a4d0e84b9ee62a18a53f
2024-03-04 07:21:01 +01:00

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Markdown

---
synopsis: Add new `eval-system` setting
prs: 4093
---
Add a new `eval-system` option.
Unlike `system`, it just overrides the value of `builtins.currentSystem`.
This is more useful than overriding `system`, because you can build these derivations on remote builders which can work on the given system.
In contrast, `system` also effects scheduling which will cause Nix to build those derivations locally even if that doesn't make sense.
`eval-system` only takes effect if it is non-empty.
If empty (the default) `system` is used as before, so there is no breakage.