Calling autoconf only should be enough (4aecd2c4).

component/groonga/buildout.cfg

@@ -5,8 +5,6 @@
 [buildout]
 extends =
   ../autoconf/buildout.cfg
-  ../automake/buildout.cfg
-  ../libtool/buildout.cfg
 parts =
   groonga
 
@@ -25,12 +23,8 @@ patch-options = -p0
 patches =
   ${groonga-1.2.8-configure-Wno-cflags-patch:location}/${groonga-1.2.8-configure-Wno-cflags-patch:filename}
 environment =
-  PATH =${autoconf:location}/bin:${automake-1.11:location}/bin:${libtool:location}/bin:%(PATH)s
+  PATH =${autoconf:location}/bin:%(PATH)s
 configure-command =
-  aclocal -I ${libtool:location}/share/aclocal -I .
-  libtoolize -c -f
-  autoheader
-  automake -c -a -f
   autoconf
   ./configure
 configure-options =