aalib-1.4rc4 wont build

[col]

I get this errer when I try to build it....can anyone help fix this ?

aclocal: /usr/share/aclocal/dvdnav.m4: 29: duplicated macro `AM_PATH_DVDNAV'
make: *** [aclocal.m4] Error 1
cd . && aclocal
aclocal: /usr/share/aclocal/dvdnav.m4: 29: duplicated macro `AM_PATH_DVDNAV'
make: *** [aclocal.m4] Error 1

!!! ERROR: The ebuild did not complete successfully.
!!! Function src_compile, Line 1847, Exitcode 2
!!! (no error message)

!!! emerge aborting on /usr/portage/media-libs/aalib/aalib-1.4_rc4-r2.ebuild .