gentoo ant-core-1.8.1 emerge 错误

ERROR: dev-java/ant-core-1.8.1 failed. 
Call stack: 
              ebuild.sh, line   48:  Called src_prepare 
            environment, line 4114:  Called java-ant_bsfix_one 'build.xml' 
            environment, line 2147:  Called java-ant_bsfix_files 'build.xml' 
            environment, line 2128:  Called _bsfix_die 'xml-rewrite2 failed: build.xml' 
            environment, line  271:  Called die 

     这是安装ant-core时一个非常怪的错误，搞了好久，才找到，还是有高手啊，http://forums.gentoo.org/viewtopic-t-766886-start-0.html 先查了ant-core依赖包。

emerge -av1 =virtual/jdk-1.6.0 dev-java/java-config portage javatoolkit