1let requiredVersion = import ./lib/minver.nix; in
2
3if ! builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.nixVersion == 1 then
4
5 abort ''
6
7 This version of Nixpkgs requires Nix >= ${requiredVersion}, please upgrade:
8
9 - If you are running NixOS, use `nixos-rebuild' to upgrade your system.
10
11 - If you installed Nix using the install script (https://nixos.org/nix/install),
12 it is safe to upgrade by running it again:
13
14 curl https://nixos.org/nix/install | sh
15 ''
16
17else
18
19 import ./pkgs/top-level/impure.nix