jade
6d84d6bdc1
This builtin was always a problem and nixpkgs uses it in exactly one
place, to give up if the Nix version is absurdly old. It has no other
use cases, and doesn't work in a multi-implementation world anyway.
Change-Id: I03c36e118591029e2ef14b091fe14a311c66a08a
584 B
584 B
| synopsis | cls | credits | category | ||
|---|---|---|---|---|---|
| `builtins.nixVersion` and `builtins.langVersion` return fixed values |
|
jade | Breaking Changes |
builtins.nixVersion now returns a fixed value "2.18.3-lix".
builtins.langVersion returns a fixed value 6, matching CppNix 2.18.
This prevents feature detection assuming that features that exist in Nix post-Lix-branch-off might exist, even though the Lix version is greater than the Nix version.
In the future, check for builtins for feature detection. If a feature cannot be detected by those means, please file a Lix bug.