phantomjs 1.9.2 got released on September 6th, 2013, and contains a number of bug fixes compared to 1.9.0. A simple copy of the current 1.9.0 ebuild seems to work fine, although I got 4 test failures doing so.
*** Bug 501070 has been marked as a duplicate of this bug. ***
+*phantomjs-1.9.7 (13 Feb 2014) + + 13 Feb 2014; Jason A. Donenfeld <zx2c4@gentoo.org> +phantomjs-1.9.7.ebuild, + -phantomjs-1.9.0.ebuild: + Version bump. + I will no longer be maintaining this package after this.