Requesting this new release to add to portage tree. Reproducible: Always
Just resync your portage tree, it is already available: 07 Dec 2014; Tim Harder (radhermit) darktable-1.6.0.ebuild, darktable-9999.ebuild: Remove gnome-keyring support as it's deprecated in favor of libsecret.
*darktable-1.6.0 (07 Dec 2014) 07 Dec 2014; Tim Harder <radhermit@gentoo.org> +darktable-1.6.0.ebuild, darktable-9999.ebuild, metadata.xml: Version bump, add libsecret use flag, and add rdep on x11-themes/gtk-engines:2 (bug #529122).
Like a charm. Great, thanks!