portage-ng / portage / gnome-extra / pch-session / 50.0
pmerge --pretend --verbose
!!! resolution failed
!!! request ( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =gnome-extra/pch-session-50.0 ), mode none
!!! trying gnome-extra/pch-session-50.0
!!!   request >=gnome-base/gnome-shell-50, mode rdepend
!!!   trying gnome-base/gnome-shell-50.5
!!!     request >=gnome-extra/evolution-data-server-3.46.0:=, mode depend
!!!     trying gnome-extra/evolution-data-server-3.60.2
!!!       request >=dev-libs/json-glib-1.0.4[introspection], mode depend
!!!       removing choices involving >=dev-libs/json-glib-1.0.4[introspection]
!!!     removing choices involving >=gnome-extra/evolution-data-server-3.46.0:=
!!!   removing choices involving >=gnome-base/gnome-shell-50

Failures encountered:
!!! failed '( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =gnome-extra/pch-session-50.0 )'
potentials:
repo gentoo: [ ebuild src: gnome-extra/pch-session-50.0 ]

Wall time
0.605 s vs. 17.702 s for portage-ng