Remove flake-utils

flake.nix

@@ -3,22 +3,17 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs =
-    {
-      nixpkgs,
-      flake-utils,
-      ...
-    }:
-    flake-utils.lib.eachDefaultSystem (
-      system:
-      let
+  outputs = { self, nixpkgs }:
+    let
+      forAllSystems = f: nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f {
         pkgs = import nixpkgs { inherit system; };
-      in
-      {
-        devShells.default = pkgs.mkShell {
+      });
+    in
+    {
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
           buildInputs = with pkgs; [
             esphome
           ];
@@ -28,6 +23,6 @@
             esphome --version
           '';
         };
-      }
-    );
+      });
+    };
 }