I see no intrinsic connection between hdf5 and time and suggest that the dependency shall be purged. Reproducible: Always
+*hdf5-1.8.8 (17 Nov 2011) + + 17 Nov 2011; Kacper Kowalik <xarthisius@gentoo.org> + +files/hdf5-1.8.8-buildsystem.patch, +hdf5-1.8.8.ebuild, metadata.xml: + Version bump wrt #390811 by Tolga Dalman, fixes bug #383843 by Cedric