discord: Bump to 0.0.17

lib/mkSystem.nix

@@ -43,6 +43,8 @@ in inputs.nixpkgs.lib.nixosSystem {
         emacs.overlay
         (import ../packages)
         (import ../overlays/simple.nix)
+
+        # Always keep sandbox.nix as the last overlay
         (import ../overlays/sandbox.nix)
       ];
     }