Upgrade nix channel and formatter

default.nix

@@ -1,4 +1,6 @@
-{ system ? builtins.currentSystem }:
+{
+  system ? builtins.currentSystem,
+}:
 let
   flake-compat = builtins.fetchTarball {
     url = "https://github.com/edolstra/flake-compat/archive/0f9255e01c2351cc7d116c072cb317785dd33b33.tar.gz";

flake.lock

@@ -22,16 +22,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1727348695,
+        "lastModified": 1727872001,
-        "narHash": "sha256-J+PeFKSDV+pHL7ukkfpVzCOO7mBSrrpJ3svwBFABbhI=",
+        "narHash": "sha256-nZNSePIWw526864XBqsrWU1dbo4Ei8iJXpNHCubui28=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "1925c603f17fc89f4c8f6bf6f631a802ad85d784",
+        "rev": "e46dc3b8343f627532ba881965b053d3bbec4235",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-unstable",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -2,53 +2,66 @@
   description = "Arnie's nix flake";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
     devshell = {
       url = "github:numtide/devshell";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, devshell }:
+  outputs =
+    {
+      self,
+      nixpkgs,
+      devshell,
+    }:
     let
-      systems = nixpkgs.lib.genAttrs [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+      systems = nixpkgs.lib.genAttrs [
+        "x86_64-linux"
+        "x86_64-darwin"
+        "aarch64-linux"
+        "aarch64-darwin"
+      ];
     in
     {
       lib = {
-        forAllSystems = function: systems (system:
+        forAllSystems =
-          function (import nixpkgs {
+          function:
+          systems (
+            system:
+            function (
+              import nixpkgs {
                 inherit system;
-            overlays = [
+                overlays = [ devshell.overlays.default ];
-              devshell.overlays.default
-            ];
                 config.allowUnfreePredicate = (pkg: builtins.elem (nixpkgs.lib.getName pkg) [ "terraform" ]);
-          })
+              }
+            )
           );
 
         golangci-config-file = ./.golangci.yml;
 
         cd_root = "cd $PRJ_ROOT;";
 
-        control4_env = self.lib.forAllSystems (pkgs: pkgs.buildEnv {
+        control4_env = self.lib.forAllSystems (
+          pkgs:
+          pkgs.buildEnv {
             name = "control4_env";
             paths = [
               pkgs.lua5_1
               pkgs.lua51Packages.busted
               pkgs.nodejs_22
             ];
-        });
+          }
+        );
       };
 
-      formatter = self.lib.forAllSystems (pkgs: pkgs.nixpkgs-fmt);
+      formatter = self.lib.forAllSystems (pkgs: pkgs.nixfmt-rfc-style);
 
       devShells = self.lib.forAllSystems (pkgs: {
         default = pkgs.devshell.mkShell {
-          name = "nix";
+          name = "c3c-nix";
 
-          packages = [
+          packages = [ pkgs.nix-tree ];
-            pkgs.nix-tree
-            pkgs.golangci-lint
-          ];
 
           commands = [
             {