--- a/scripts/desktop-update/posix.sh
+++ b/scripts/desktop-update/posix.sh
@@ -317,6 +317,8 @@
   if [ ! -e "$sb" ]; then GATE=relaunch; return; fi
   if [ -u "$sb" ] && [ "$(stat -c %u "$sb" 2>/dev/null)" = "0" ]; then GATE=relaunch; return; fi
 
+  if unshare --user --map-root-user true 2>/dev/null; then GATE=relaunch; return; fi
+
   case "${ELECTRON_DISABLE_SANDBOX:-}" in 1|true|TRUE|True) GATE=relaunch; return ;; esac
   [ "$SANDBOX_FALLBACK" -eq 1 ] && { GATE=relaunch; return; }
   for arg in ${RELAUNCH_ARGS[@]+"${RELAUNCH_ARGS[@]}"}; do