default.nix: say which old Nix version is being used (#435683)

This commit is contained in:
jade
2025-08-21 18:11:53 -07:00
committed by GitHub
+2 -1
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@@ -6,7 +6,8 @@ if !builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.n
abort ''
This version of Nixpkgs requires Nix >= ${requiredVersion}, please upgrade:
This version of Nixpkgs requires Nix >= ${requiredVersion} but it is being
evaluated with Nix ${builtins.nixVersion or "(too old to know)"}, please upgrade:
- If you are running NixOS, `nixos-rebuild' can be used to upgrade your system.