Ebuilds depend on virtual/libstdc++ (on x86) and app-emulation/emul-linux-x86-compat (on amd64). However, none of the install binaries links against libstdc++.so.5: TYPE NEEDED FILE ET_EXEC libm.so.6,libpthread.so.0,libGL.so.1,libGLU.so.1,libmss.so.6,libSDL-1.2.so.0,libc.so.6 ./opt/nwn/en/nwmain ET_EXEC libm.so.6,libpthread.so.0,libc.so.6 ./opt/nwn/en/nwserver ET_DYN libm.so.6,libdl.so.2,libpthread.so.0,libc.so.6 ./opt/nwn/lib/libSDL.so ET_DYN libm.so.6,libSDL-1.2.so.0,libpthread.so.0,libc.so.6 ./opt/nwn/lib/libSDL_gfx.so ET_DYN libc.so.6,ld-linux.so.2 ./opt/nwn/lib/libelf.so So above-mentioned dependencies should be removed from RDEPEND, for all ebuilds of the package: nwn-1.68-r5.ebuild nwn-1.68-r6.ebuild nwn-1.69-r1.ebuild