/etc/portage/profile/overrides

profile-overrides

package.mask
-net-firewall/firewalld
package.use.mask
### 20191230 -- negates the instruction set in
### /usr/portage/profiles/features/selinux/package.use.mask
net-wireless/bluez -user-session

use.mask
-systemd

use.stable.mask
# 20171203 amel
# ruby-2.2 is stable version on Gentoo.
# To use ruby-2.4 on an otherwise stable system, according 
# to GentooWiki, add the following to unmask "unstable" 
# version of ruby to this file: /etc/portage/profile/use.stable.mask
-ruby_targets_ruby24
# unmasking python35 20171203 amel
# -python_targets_python3_5
# -python_single_target_python3_5
#### 20181118 -- comment out py35, since it's already stable
### and enable ruby25 for testing
-ruby_targets_ruby25
# 20180128 amel
# adding SELinux to Gentoo system
# systemd was masked upstream with SELinux.  This will enable the systemd USE flag
# once again
-systemd
-selinux
openrc-force
-hardened