flake2channel: filter self also from registry

modules/flake2channel.nix

@@ -1,7 +1,11 @@
-{ inputs, config, lib, ... }: {
+{ inputs, config, lib, ... }: let
+  filterSelf = inp: lib.filterAttrs # this prevents including the customer's ansible repo, which may contain bare secrets
+    (name: _: name != "self")
+    inp;
+in {
   # This will add each flake input as a registry
   # To make nix3 commands consistent with your flake
-  nix.registry = (lib.mapAttrs (_: flake: {inherit flake;})) ((lib.filterAttrs (_: lib.isType "flake")) inputs);
+  nix.registry = (lib.mapAttrs (_: flake: {inherit flake;})) ((lib.filterAttrs (_: lib.isType "flake")) (filterSelf inputs));
 
   # This will additionally add your inputs to the system's legacy channels
   # Making legacy nix commands consistent as well, awesome!
@@ -11,8 +15,5 @@
     (name: value: {
       name = "nix/path/${name}";
       value.source = value.flake;
-    }) (lib.filterAttrs # this prevents including the customer's ansible repo, which may contain bare secrets
-         (name: _: name != "self")
-         config.nix.registry
-       );
+    }) (filterSelf config.nix.registry);
 }