Found it. I have to create my own package.use.mask file in /etc/portage/profile that reverts the setting.
Am Thu, 28 Dec 2017 02:10:36 +0000 schrieb Jörg Schaible: > Hi, > > how can I unmask a use flag masked in profiles/base/package.use.mask? If > I set the flag for the package in / etc/portage/package.use it is simply > ignored. > > Concrete example: My /etc/portage/package.use contains the line: > > dev-java/oracle-jdk-bin:9 doc gentoo-vm source > > However the flag 'gentoo-vm' is always ignored because it is masked in > profiles/base/package.use.mask with the line: > > dev-java/oracle-jdk-bin:9 gentoo-vm > > What's the proper procedure to unmask the flag locally? > > (Yes, I know it is experimental and yes I know what I am doing with it. > I already use eselect for older EA builds of Java 9 with 1.9 slot and > new EA builds of Java 10 - just not the "official" Java 9 from the > tree.) > > Cheers, > Jörg