!!! The ebuild selected to satisfy ">=net-libs/webkit-gtk-2.7.2:4" has unmet requirements.
- net-libs/webkit-gtk-2.8.5::gentoo USE="(X) egl geoloc gles2 gstreamer introspection jit libsecret opengl spell webgl -coverage -doc -test (-wayland)" ABI_X86="64"

  The following REQUIRED_USE flag constraints are unsatisfied:
    webgl? ( exactly-one-of ( gles2 opengl ) )

  The above constraints are a subset of the following complete expression:
    geoloc? ( introspection ) gles2? ( egl ) introspection? ( gstreamer ) webgl? ( exactly-one-of ( gles2 opengl ) ) !webgl? ( at-most-one-of ( gles2 opengl ) ) any-of ( wayland X )

(dependency required by "net-libs/gnome-online-accounts-3.16.3-r1::gentoo" [ebuild])
(dependency required by "gnome-base/gvfs-1.24.2::gentoo[gnome-online-accounts]" [ebuild])
(dependency required by "gnome-base/gnome-3.16.0::gentoo" [ebuild])
(dependency required by "gnome-base/gnome" [argument])