nanobsd(8) on FreeBSD
The text 753f9a0e7c89, as FreeBSD 12.2-RELEASE shipped it.
utility used to create a FreeBSD system image suitable for embedded applications
Flags it lists
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-K -
-X -
-b -
-c -
-f -
-h -
-i -
-k -
-n -
-q -
-v -
-w