[gentoo-embedded] how can i add an sshd to my embedded gentoo?

I tried to emerge ssh into my development system but I get a block:

 	linux #   ROOT=/embedded_rootfs emerge ssh
 	Calculating dependencies ...done!

 	!!! Error: the net-misc/dropbear package conflicts with another package.
 	!!!        both can't be installed on the same system together.
 	!!!        Please use 'emerge --pretend' to determine blockers.

 	linux #   ROOT=/embedded_rootfs emerge --pretend ssh

 	These are the packages that I would merge, in order:

 	Calculating dependencies ...done!
 	[blocks B     ] net-misc/dropbear (is blocking net-misc/ssh-3.2.9.1-r1)
 	[ebuild  N    ] net-misc/ssh-3.2.9.1-r1  to /embedded_rootfs/

I learn that dropbear is a small footprint ssh server, but I can't find
it anywhere in the resulting system. What have I misunderstood here?

Thanks,
Michael
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