add dev shell

.envrc

@@ -0,0 +1 @@
+use nix

flake.nix

@@ -66,5 +66,8 @@
         modules = [ ./users/pbsds/home ];
       };
     });
+    devShells = forAllSystems (system: {
+      default = nixpkgs.legacyPackages.${system}.callPackage ./shell.nix { };
+    });
   };
 }

shell.nix

@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  packages = with pkgs; [
+  #buildInputs = with pkgs; [
+    nixos-rebuild
+  ];
+}