安装MacPorts遇到的奇葩问题

lunaest

从官网上下载的pkg文件，安装完之后运行显示：

/opt/local/libexec/macports/lib/tcl8.5/init.tcl: version conflict for package "Tcl": have 8.5.13, need exactly 8.5.15

version conflict for package "Tcl": have 8.5.13, need exactly 8.5.15

    while executing

"package require -exact Tcl 8.5.15"

    (file "/opt/local/libexec/macports/lib/tcl8.5/init.tcl" line 19)

    invoked from within

"source /opt/local/libexec/macports/lib/tcl8.5/init.tcl"

    ("uplevel" body line 1)

    invoked from within

"uplevel #0 [list source $tclfile]"

按照网上说的打开这个文件：file "/opt/local/libexec/macports/lib/tcl8.5/init.tcl"
修改

if {[info commands package] == ""} {

    error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"

}

package require -exact Tcl 8.5.15

变成

if {[info commands package] == ""} {

    error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"

}

package require -exact Tcl 8.5.13

再运行又开始报错说：

/opt/local/libexec/macports/lib/tcl8.5/init.tcl: version conflict for package "Tcl": have 8.5.15, need exactly 8.5.13

version conflict for package "Tcl": have 8.5.15, need exactly 8.5.13

    while executing

"package require -exact Tcl 8.5.13"

    (file "/opt/local/libexec/macports/lib/tcl8.5/init.tcl" line 19)

    invoked from within

"source /opt/local/libexec/macports/lib/tcl8.5/init.tcl"

    ("uplevel" body line 1)

    invoked from within

"uplevel #0 [list source $tclfile]"

真是哭笑不得。
求大神赐教啊！！！