use terranix flake parts module directly

terranixConfigurations.nix

@@ -1,22 +1,17 @@
 { inputs, ... }:
 
-let
-  lib = inputs.nixpkgs.lib;
-  utils = import ./utils.nix { inherit inputs lib; };
-  inherit (utils) mkTerranixDerivation;
+{
+  imports = [
+    inputs.terranix.flakeModule
+  ];
 
-  configs = {
+  perSystem = {
+    terranix.terranixConfigurations = {
       # Example:
       # myconfig = {
       #   modules = [ ./terraform/myconfig.nix ];
+      #   extraArgs = { };  # optional
       # };
     };
-in
-
-{
-  perSystem =
-    { system, ... }:
-    {
-      packages = mkTerranixDerivation { inherit system configs; };
   };
 }

utils.nix

@@ -7,7 +7,6 @@ let
     nixpkgs-stable
     home-manager
     agenix
-    terranix
     ;
 in
 
@@ -191,66 +190,4 @@ in
       };
     in
     lib.mapAttrs (_: lib.recursiveUpdate commonVHostConfig) domains;
-
-  # Terranix configuration system
-  mkTerranixDerivation =
-    {
-      system,
-      configs,
-    }:
-    lib.mapAttrs (
-      name: cfg:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-        modules = cfg.modules;
-        extraArgs = cfg.extraArgs or { };
-
-        terraformConfiguration = terranix.lib.terranixConfiguration {
-          inherit system modules;
-          extraArgs = {
-            inherit lib pkgs;
-          } // extraArgs;
-        };
-
-        tf-json = pkgs.writeShellScriptBin "default" ''
-          cat ${terraformConfiguration} | ${pkgs.jq}/bin/jq
-        '';
-
-        apply = pkgs.writeShellScriptBin "apply" ''
-          if [[ -e config.tf.json ]]; then rm -f config.tf.json; fi
-          cp ${terraformConfiguration} config.tf.json \
-            && ${pkgs.terraform}/bin/terraform init \
-            && ${pkgs.terraform}/bin/terraform apply
-        '';
-
-        plan = pkgs.writeShellScriptBin "plan" ''
-          if [[ -e config.tf.json ]]; then rm -f config.tf.json; fi
-          cp ${terraformConfiguration} config.tf.json \
-            && ${pkgs.terraform}/bin/terraform init \
-            && ${pkgs.terraform}/bin/terraform plan
-        '';
-
-        destroy = pkgs.writeShellScriptBin "destroy" ''
-          if [[ -e config.tf.json ]]; then rm -f config.tf.json; fi
-          cp ${terraformConfiguration} config.tf.json \
-            && ${pkgs.terraform}/bin/terraform init \
-            && ${pkgs.terraform}/bin/terraform destroy
-        '';
-
-        create-state-bucket = pkgs.writeShellScriptBin "create-state-bucket" ''
-          BUCKET_NAME=''${1:-"terraform-state-bucket"}
-          ACCOUNT_ID=''${2:?"Error: Cloudflare account ID required as second argument"}
-          R2_ENDPOINT="https://$ACCOUNT_ID.r2.cloudflarestorage.com"
-
-          echo "Creating R2 bucket $BUCKET_NAME..."
-          ${pkgs.awscli}/bin/aws s3api create-bucket \
-            --bucket "$BUCKET_NAME" \
-            --endpoint-url "$R2_ENDPOINT"
-          echo "Bucket created successfully at $R2_ENDPOINT"
-        '';
-      in
-      tf-json // {
-        inherit apply plan destroy create-state-bucket;
-      }
-    ) configs;
 }