diff --git a/features/scripts/utils/nomarchy-installed-summary b/features/scripts/utils/nomarchy-installed-summary
index 0363912..aad28e0 100755
--- a/features/scripts/utils/nomarchy-installed-summary
+++ b/features/scripts/utils/nomarchy-installed-summary
@@ -26,9 +26,14 @@ tz=$(jq_or_empty "$SYS_STATE" '.timezone')
 dns=$(jq_or_empty "$SYS_STATE" '.dns')
 hybrid_gpu=$(jq_or_empty "$SYS_STATE" '.features.hybridGPU')
 
-# Form factor: same battery-presence check the installer uses to auto-set
-# nomarchy.{system.,}formFactor.
-if compgen -G "/sys/class/power_supply/BAT*" >/dev/null; then
+# Form factor: battery presence (same signal the installer uses to auto-set
+# nomarchy.{system.,}formFactor). `compgen` is a bash programmable-completion
+# builtin, and the non-interactive bash this script gets wrapped with is
+# compiled without it — so a glob into a nullglob array, not `compgen -G`.
+shopt -s nullglob
+batteries=( /sys/class/power_supply/BAT* )
+shopt -u nullglob
+if (( ${#batteries[@]} )); then
     form_factor="laptop"
 else
     form_factor="desktop"