The hexdump command is linux-only, and apparently comes from the util-linux command. Something that is available on other platforms would be a better choice. I haven't followed my way through the script to figure out where all it uses this, so I don't know what features and formats are required. I do know that dehydrated has been working flawlessly on my Illumos-derived systems for years without hexdump installed. Maybe xxd would work? That seems to be widely available.
The hexdump command is linux-only, and apparently comes from the util-linux command. Something that is available on other platforms would be a better choice. I haven't followed my way through the script to figure out where all it uses this, so I don't know what features and formats are required. I do know that dehydrated has been working flawlessly on my Illumos-derived systems for years without hexdump installed. Maybe xxd would work? That seems to be widely available.