[arch-general] building vorbis-tools

[Baho Utot]

vorbis-tools gives me the following error

  -> bsdtar -x -f vorbis-tools-1.2.0.tar.gz
==> Entering fakeroot environment...
==> Starting build()...
aclocal.m4:14: error: this file was generated for autoconf 2.61.
You have another version of autoconf.  If you want to use that,
you should regenerate the build system entirely.
aclocal.m4:14: the top level
autom4te: /usr/bin/m4 failed with exit status: 63
==> ERROR: Build Failed.
    Aborting...

autoconf is in the PKGBUILD file 

build() 
{
  cd $startdir/src/$pkgname-$pkgver
  autoconf
  ./configure --prefix=/usr --without-speex 
  make || return 1
  make DESTDIR=$startdir/pkg install
}


what could cause this error?