templates: switch to flake-parts

templates/_wrapper/simple/flake.nix

@@ -3,8 +3,11 @@
     nixvim.url = "path:../../..";
     simple = {
       url = "path:../../simple";
-      inputs.nixvim.follows = "nixvim";
-      inputs.flake-utils.follows = "nixvim/flake-utils";
+      inputs = {
+        nixvim.follows = "nixvim";
+        nixpkgs.follows = "nixvim/nixpkgs";
+        flake-parts.follows = "nixvim/flake-parts";
+      };
     };
   };
 

templates/simple/flake.nix

@@ -2,22 +2,33 @@
   description = "A nixvim configuration";
 
   inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     nixvim.url = "github:nix-community/nixvim";
-    flake-utils.url = "github:numtide/flake-utils";
+    flake-parts.url = "github:hercules-ci/flake-parts";
   };
 
   outputs = {
     self,
-    nixpkgs,
     nixvim,
-    flake-utils,
+    flake-parts,
     ...
   } @ inputs: let
     config = import ./config; # import the module directly
   in
-    flake-utils.lib.eachDefaultSystem (system: let
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      perSystem = {
+        pkgs,
+        system,
+        ...
+      }: let
         nixvimLib = nixvim.lib.${system};
-      pkgs = import nixpkgs {inherit system;};
         nixvim' = nixvim.legacyPackages.${system};
         nvim = nixvim'.makeNixvimWithModule {
           inherit pkgs;
@@ -40,5 +51,6 @@
           # Lets you run `nix run .` to start nixvim
           default = nvim;
         };
-    });
+      };
+    };
 }