emerge: there are no ebuilds built with USE flags to satisfy "dev-python/pyxattr[python_targets_python2_7]".
!!! One of the following packages is required to complete your request:
- dev-python/pyxattr-0.6.0-r1::gentoo (Missing IUSE: python_targets_python2_7)
(dependency required by "sys-apps/calculate-utils-3.6.7.29::calculate" [ebuild])
(dependency required by "calculate-utils" [argument])