$* doesn't work if the target doesn't use a wildcard. Furthermore the GNU make manual...
tree17e890d241a584a9725a25e496ce4cf48f5d7df0
drwxr-xr-x - apps
drwxr-xr-x - backdrops
drwxr-xr-x - bootloader
drwxr-xr-x - docs
drwxr-xr-x - firmware
drwxr-xr-x - flash
drwxr-xr-x - fonts
drwxr-xr-x - gdb
drwxr-xr-x - icons
drwxr-xr-x - manual
drwxr-xr-x - rbutil
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drwxr-xr-x - uisimulator
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