forked from lix-project/lix
Switch example to a primop this is less ill-advised
Any primop will do for this, so might as well use one that isn't impure. Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
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@ -9,7 +9,8 @@ These constants are built into the Nix language evaluator:
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Since built-in functions were added over time, [testing for attributes](./operators.md#has-attribute) in `builtins` can be used for graceful fallback on older Nix installations:
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```nix
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if builtins ? getEnv then builtins.getEnv "PATH" else ""
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# if hasContext is not available, we assume `s` has a context
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if builtins ? hasContext then builtins.hasContext s else true
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```
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- [`builtins.currentSystem`]{#builtins-currentSystem} (string)
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