nil: don't depend on latest nix version

I think this was added when we didn't had nix 2.24 as the default.
I don't think this should be needed anymore?

Author: Mic92

pkgs/by-name/ni/nil/package.nix

@@ -2,7 +2,7 @@
   lib,
   rustPlatform,
   fetchFromGitHub,
-  nixVersions,
+  nix,
   nix-update-script,
 }:
 
@@ -20,9 +20,7 @@ rustPlatform.buildRustPackage rec {
   useFetchCargoVendor = true;
   cargoHash = "sha256-7TR/xTc66WpPszJDrpisVvHXl2+FGrUOskZAkGyY04Q=";
 
-  nativeBuildInputs = [
-    (lib.getBin nixVersions.latest)
-  ];
+  nativeBuildInputs = [ nix ];
 
   env.CFG_RELEASE = version;