RequiredUseDefaults: version 4.11: profile: 'default/linux/amd64/23.0' (96 total) failed REQUIRED_USE: exactly-one-of ( bliss nauty )
  VariableOrderWrong: version 4.11: variable HOMEPAGE should occur before SRC_URI
  RequiredUseDefaults: version 4.13: profile: 'default/linux/amd64/23.0' (62 total) failed REQUIRED_USE: exactly-one-of ( bliss nauty )