nvclock has the line IUSE="qt gtk" in it, however it pays attention to the gtk2 flag too. Reproducible: Always Steps to Reproduce: USE="-gtk gtk2 qt" emerge -evp nvclock | grep gtk Actual Results: GTK+ is listed as a dependency. Expected Results: According to a recent post on -dev, USE="-gtk gtk2" means "never build a gtk interface. Regardless of this, gtk2 should still be in the IUSE value.
fixed in CVS