On Sat Apr 25 20:33:36 2020, [email protected] wrote:
>
> Hi Remy,
>
> that helped !
>
> To be honest ... I never had deduced this from the error message.
> Is this pure experience...somehing one had to learn after uears
> of trying to cope with The Portage Oracle...or is it one has
> and the other one has not...? ;)
>
> ...or what manual do I need to read to up with this line?
For the "Oracle" output of portage:
## The following REQUIRED_USE flag constraints are unsatisfied:
## exactly-one-of ( python_single_target_python3_6
python_single_target_python3_7 python_single_target_python3_8 )
^^^^^^^^^^^^^^
So "exactly one of the listed use flags".
For the documentation on syntax:
"man portage" and go to the "package.use" section
or visit
https://wiki.gentoo.org/wiki//etc/portage/package.use
