checking for exo-0.3 >= 0.3.0... not found *** The required package exo-0.3 was not found on your system. *** Please install exo-0.3 (atleast version 0.3.0) or adjust *** the PKG_CONFIG_PATH environment variable if you *** installed the package in a nonstandard prefix so that *** pkg-config is able to find it.
Also the same here. exo-0.3 doesn't appear to be in portage at the moment. (03-06-2005)
xfce-extra/exo-0.3.0_pre1 is good enough.
fixed a while ago