Drop-in replacement support for importing <nixpkgs/nixos/lib/eval-config.nix>

This is part of nixpkgs' public interface.

diff --git a/nixos/lib/eval-config.nix b/nixos/lib/eval-config.nix
new file mode 100644 (file)
index 0000000..2380a96
--- /dev/null
+++ b/nixos/lib/eval-config.nix
@@ -0,0 +1,4 @@
+let actualNixpkgs = import <nixpkgs-warned> {};
+in actualNixpkgs.lib.warn ("Using legacy channel eval-config from "
+  + <nixpkgs-stable/nixos/lib/eval-config.nix>)
+(import <nixpkgs-stable/nixos/lib/eval-config.nix>)