fix: formatting

template/flake.nix

@@ -23,15 +23,8 @@
         "aarch64-darwin"
       ];
       forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
-    in
-    {
-      devShells = forAllSystems (
-        system:
-        let
-          pkgs = import nixpkgs { inherit system; };
-          env = devshell-lib.lib.mkDevShell {
-            inherit system;
 
+      mkDevShellConfig = pkgs: {
         # includeStandardPackages = false; # opt out of nixfmt/gitlint/gitleaks/shfmt defaults
 
         extraPackages = with pkgs; [
@@ -80,6 +73,14 @@
         '';
       };
     in
+    {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+          config = mkDevShellConfig pkgs;
+          env = devshell-lib.lib.mkDevShell ({ inherit system; } // config);
+        in
         {
           default = env.shell;
         }
@@ -88,14 +89,23 @@
       checks = forAllSystems (
         system:
         let
-          env = devshell-lib.lib.mkDevShell { inherit system; };
+          pkgs = import nixpkgs { inherit system; };
+          config = mkDevShellConfig pkgs;
+          env = devshell-lib.lib.mkDevShell ({ inherit system; } // config);
         in
         {
           inherit (env) pre-commit-check;
         }
       );
 
-      formatter = forAllSystems (system: (devshell-lib.lib.mkDevShell { inherit system; }).formatter);
+      formatter = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+          config = mkDevShellConfig pkgs;
+        in
+        (devshell-lib.lib.mkDevShell ({ inherit system; } // config)).formatter
+      );
 
       # Optional: release command (`release`)
       #