fix(jeeves)!: nix.registry and nix.nixPath

machines/nixos/x86_64-linux/jeeves/configuration.nix

@@ -50,19 +50,16 @@
   hardware.enableRedistributableFirmware = true;
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 
-  nix = {
-    registry =
-      lib.mapAttrs
-        (_: value: {
-          flake = value;
-        })
-        inputs;
+  nix = let
+    flakeInputs = lib.filterAttrs (lib.const (lib.isType "flake")) inputs;
+  in {
+    # This will add each flake input as a registry
+    # To make nix3 commands consistent with your flake
+    registry = lib.mapAttrs (_: value: { flake = value; }) flakeInputs;
 
-    nixPath =
-      lib.mapAttrsToList
-        (key: value:
-          "${key}=${value.to.path}")
-        config.nix.registry;
+    # This will additionally add your inputs to the system's legacy channels
+    # Making legacy nix commands consistent as well, awesome!
+    nixPath = lib.mapAttrsToList (key: value: "${key}=flake:${key}") flakeInputs;
 
     settings = {
       trusted-users = [