Add devenv nix

systems/balrog/default.nix

@@ -2,11 +2,10 @@
 # your system. Help is available in the configuration.nix(5) man page, on
 # https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
 
-{
-  config,
-  lib,
-  pkgs,
-  ...
+{ config
+, lib
+, pkgs
+, ...
 }:
 
 {

systems/balrog/hardware-configuration.nix

@@ -1,12 +1,11 @@
 # Do not modify this file!  It was generated by ‘nixos-generate-config’
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{
-  config,
-  lib,
-  pkgs,
-  modulesPath,
-  ...
+{ config
+, lib
+, pkgs
+, modulesPath
+, ...
 }:
 
 {