diff --git a/system/system-yarn.nix b/system/system-yarn.nix
index 4c34027..f74be6c 100644
--- a/system/system-yarn.nix
+++ b/system/system-yarn.nix
@@ -146,6 +146,13 @@
           installPhase = ''
             mkdir -p $out/bin
             ln -s ${steamos-update-script} $out/bin/steamos-update
+            ln -s ${steamos-update-script} $out/bin/steamos-mandatory-update
+
+            # jupiter-initial-firmware-update: no-op (not a real steam deck)
+            cat > $out/bin/jupiter-initial-firmware-update << 'STUB'
+            #!/bin/sh
+            exit 0
+            STUB
 
             # steamos-reboot: reboot the system
             cat > $out/bin/steamos-reboot << 'STUB'