The required .so file was named using @CLUTTER_WINSYS@ but since bf9d5f3949 the .so should be named with @CLUTTER_SONAME_INFIX@. This was breaking the build on eglx.
bf9d5f3949
http://bugzilla.clutter-project.org/show_bug.cgi?id=2099 Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>