RequiredUseDefaults: version 1.7: profile: 'default/linux/amd64/17.0/musl' (14 total) failed REQUIRED_USE: exactly-one-of ( systemd elogind )
  RequiredUseDefaults: version 1.7: profile: 'default/linux/amd64/17.0/x32' failed REQUIRED_USE: ( abi_x86_32 || abi_x86_64 )
  RequiredUseDefaults: version 1.8.1: profile: 'default/linux/amd64/17.0/musl' (14 total) failed REQUIRED_USE: exactly-one-of ( systemd elogind )
  RequiredUseDefaults: version 1.8.1: profile: 'default/linux/amd64/17.0/x32' failed REQUIRED_USE: ( abi_x86_32 || abi_x86_64 )