i got the following error in a fresh install with KDE desktop emerging calligra.
# emerge -av app-office/calligra
These are the packages that would be merged, in order:
Calculating dependencies... done!
emerge: there are no ebuilds built with USE flags to satisfy "app-crypt/qca:2[qt5]".
!!! One of the following packages is required to complete your request:
- app-crypt/qca-2.2.0_pre20180606::nokit (Missing IUSE: qt5)
- app-crypt/qca-2.1.3-r2::nokit (Missing IUSE: qt5)
(dependency required by "app-office/calligra-3.1.0-r1::kde-kit[crypt]" [ebuild])
(dependency required by "app-office/calligra" [argument])
qca is already installed, but qca does not have a use flag qt5. At least the currently visible versions of app-crypt/qca-2.2.0_pre20180606 and app-crypt/qca-2.1.3-r2