added devshell.

flake.nix

@@ -14,10 +14,6 @@
       url = "github:nix-community/nixvim";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-
-    # Shameless plug: looking for a way to nixify your themes and make
-    # everything match nicely? Try nix-colors!
-    # nix-colors.url = "github:misterio77/nix-colors";
   };
 
   outputs = {
@@ -28,8 +24,25 @@
     ...
   } @ inputs: let
     inherit (self) outputs;
+    forAllSystems = nixpkgs.lib.genAttrs [
+      "x86_64-linux"
+      "aarch64-linux"
+    ];
   in {
-    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
+    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
+
+    devShells = forAllSystems (
+      system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            just
+          ];
+        };
+      }
+    );
+
     # NixOS configuration entrypoint
     # Available through 'nixos-rebuild --flake .#your-hostname'
     nixosConfigurations = {
@@ -43,7 +56,6 @@
       "gabe@archlaptop" = home-manager.lib.homeManagerConfiguration {
         pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
         extraSpecialArgs = {inherit inputs outputs;};
-        # > Our main home-manager configuration file <
         modules = [
           ./hosts/gabe-archlaptop.nix
           nixvim.homeManagerModules.nixvim
@@ -52,7 +64,6 @@
       "gabe@gv-workstation" = home-manager.lib.homeManagerConfiguration {
         pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
         extraSpecialArgs = {inherit inputs outputs;};
-        # > Our main home-manager configuration file <
         modules = [
           ./hosts/gabe-gv-workstation.nix
           nixvim.homeManagerModules.nixvim