chore: NIX_PATH and registry.json is now set by default for flake sys…

…tems

hosts/common/global/nix/linux.nix

@@ -3,6 +3,7 @@ let
   # Map registries to channels
   # very useful when using legacy commands (they use NIX_PATH and this is what we are building here)
   # also make sure that no imperative channels are in use: nix-channel --list should be empty
+  # this happens by default in flake-based nixos systems, but here we have a generic linux
   nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
 in
 {

hosts/common/global/nix/shared.nix

@@ -6,16 +6,6 @@
   customArgs,
   ...
 }:
-let
-  # Add each flake input as a registry
-  # To make nix3 commands consistent with the flake
-  # this becomes registry.nixpkgs.flake = inputs.nixpkgs etc. for all inputs
-  registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
-  # Map registries to channels
-  # very useful when using legacy commands (they use NIX_PATH and this is what we are building here)
-  # also make sure that no imperative channels are in use: nix-channel --list should be empty
-  nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
-in
 {
   nixpkgs = {
     overlays = [
@@ -36,7 +26,6 @@ in
   };
   nix =
     {
-      inherit registry;
       package = pkgs.nixVersions.latest;
       settings = {
         auto-optimise-store = lib.mkDefault true;
@@ -66,7 +55,6 @@ in
     # but it will work for nixos config and for nix-darwin config
     # this check is needed because of generic linux entry in homeConfigurations
     // lib.optionalAttrs (builtins.hasAttr "nixPath" config.nix) {
-      inherit nixPath;
       # should be >= max-jobs
       nrBuildUsers = 16;
     };