Merge 安装GDBM时发生MacPorts错误

当我尝试运行命令

sudo port install gdbm

时，输出如下：

--->  Fetching archive for gdbm  
--->  Attempting to fetch gdbm-1.10_0+universal.darwin_11.i386-x86_64.tbz2 from http://packages.macports.org/gdbm  
--->  Fetching gdbm  
--->  Verifying checksum(s) for gdbm  
--->  Extracting gdbm  
--->  Configuring gdbm  
--->  Building gdbm  
--->  Staging gdbm into destroot  
Error: Target org.macports.destroot returned: /opt/local/lib/libgdbm.la differs in /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_databases_gdbm/gdbm/work/destroot-i386 and /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_databases_gdbm/gdbm/work/destroot-x86_64 and cannot be merged
Log for gdbm is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_databases_gdbm/gdbm/main.log
Error: Unable to upgrade port: 1
Error: Unable to execute port: upgrade pkgconfig failed
To report a bug, see <http://guide.macports.org/#project.tickets>`

-->获取gdbm的存档文件
--->正在尝试从中获取gdbm-1.10_0+universal.darwin_11.i386-x86_64.tbz2http://packages.macports.org/gdbm  
--->获取gdbm
--->验证gdbm的校验和
--->提取gdbm
--->配置gdbm
--->构建gdbm
--->将gdbm转移到destroot中
错误：返回的Target org.macports.destroot:/opt/local/lib/libgdbm.la在/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u svn.macports.org\u trunk\u dports\u databases\u gdbm/gdbm/work/destroot-i386和/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_databases_gdbm/gdbm/work/desroot-x86_64，不能合并
gdbm的日志位于：/opt/local/var/macports/logs/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_databases_gdbm/gdbm/main.Log
错误：无法升级端口：1
错误：无法执行端口：升级pkgconfig失败
要报告错误，请参阅`

为什么

见日志：

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添加日志。您认为如何？不明显-根据指南报告macports错误