nixpkgs-review

hosts/default.nix

@@ -37,7 +37,7 @@ let
       (final: prev: {
         unstable = import inputs.unstable {
           inherit system;
-          config = final.pkgs.config;
+          inherit (final.pkgs) config overlays;
         };
       })
     ];

profiles/base/lix.nix

@@ -4,4 +4,22 @@
 
 {
   nix.package = lib.mkIf (pkgs ? lix) pkgs.lix;
+
+  # this also affect pkgs.unstable which inherits final.pkgs.overlays
+  nixpkgs.overlays = [
+    (final: prev: {
+      # oc
+
+      nixpkgs-review = prev.nixpkgs-review.override {
+        nix = prev.lix;
+      };
+
+      # pkgs/tools/package-management/lix/default.nix
+
+      nix-direnv = prev.nix-direnv.override {
+        nix = prev.lix;
+      };
+    })
+  ]
+  ;
 }