pulsed ~ # emerge --ask --changed-use --deep @world

These are the packages that would be merged, in order:

Calculating dependencies... done!

!!! The ebuild selected to satisfy "app-text/mupdf" has unmet requirements.
- app-text/mupdf-1.11-r1::gentoo USE="X curl opengl openssl static-libs -javascript (-libressl) -static -vanilla" ABI_X86="(64)"

  The following REQUIRED_USE flag constraints are unsatisfied:
    opengl? ( !static-libs )

  The above constraints are a subset of the following complete expression:
    opengl? ( X !static !static-libs )

(dependency required by "net-print/cups-filters-1.13.5::gentoo[pdf]" [ebuild])
(dependency required by "net-print/cups-2.1.4::gentoo" [ebuild])
(dependency required by "x11-libs/gtk+-3.22.16::gentoo[cups]" [ebuild])
(dependency required by "app-editors/gedit-3.22.0::gentoo" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])
pulsed ~ #