I noticed that this package is masked when installing in my RPi4 and tried adding keyword by
`echo "sys-process/incron amd64" > /etc/portage/package.accept_keywords/incron`.
There is no issues, while installing, so it'd be better to keyword the package in the portage tree itself.
(( `uname -a` => "Linux pi64 5.6.10-v8+ #1 SMP PREEMPT Sun May 17 11:24:00 BST 2020 aarch64 GNU/Linux" ))
all arches done