diff --git a/pkgs/upgrade-system/default.nix b/pkgs/upgrade-system/default.nix
index 78fc4f2..0bfe9ff 100644
--- a/pkgs/upgrade-system/default.nix
+++ b/pkgs/upgrade-system/default.nix
@@ -4,6 +4,7 @@ pkgs.writeShellApplication {
   name = "upgrade-system";
   text = builtins.readFile ./upgrade-system.sh;
   runtimeInputs = with pkgs; [
+    bash
     curl
     jq
     nix