我刚刚安装了 ActiveState 来测试 Cygwin/Perl 的替代方案，但安装 cpan 包时遇到了一些问题。
我想安装Win32::GuiTestppm 下未列出的。然后我启动了一个 cmd.exe 并输入：
C:\>cpan Win32::GuiTest
返回：
c:\>cpan Win32::GuiTest
CPAN: Storable loaded ok (v2.45)
Reading '\cygdrive\e\home\.cpan\Metadata'
Database was generated on Mon, 22 Sep 2014 15:29:02 GMT
Running install for module 'Win32::GuiTest'
Running make for K/KA/KARASIK/Win32-GuiTest-1.60.tar.gz
CPAN: Digest::SHA loaded ok (v5.85)
CPAN: Compress::Zlib loaded ok (v2.063)
Checksum for \cygdrive\e\home\.cpan\sources\authors\id\K\KA\KARASIK\Win32-GuiTest-1.60.tar.gz ok
The system cannot find the path specified.
Uncompressed \cygdrive\e\home\.cpan\sources\authors\id\K\KA\KARASIK\Win32-GuiTest-1.60.tar.gz successfully
Using Tar:/usr/bin/tar xf "Win32-GuiTest-1.60.tar":
The system cannot find the path specified.
Couldn't untar Win32-GuiTest-1.60.tar: child exited with value 1
CPAN: File::Temp loaded ok (v0.2304)
CPAN: CPAN::Meta loaded ok (v2.132830)
CPAN: Time::HiRes loaded ok (v1.9726)
Package seems to come without Makefile.PL.
(The test -f "\cygdrive\e\home\.cpan\build\KARASIK-85id4t\Makefile.PL" returned false.)
Writing one on our own (setting NAME to Win32GuiTest)
Had problems unarchiving. Please build manually
Running make test
Make had some problems, won't test
Running make install
Make had some problems, won't install
所以它似乎cpan以某种方式与 cygwin 交互，我不知道为什么。我正在运行正确版本的 cpan：
c:\>cpan --help
C:\Perl64\bin/cpan.bat version 1.61 calling Getopt::Std::getopts (version 1.07 [paranoid]),
running under Perl version 5.18.2.
Usage: cpan.bat [-OPTIONS [-MORE_OPTIONS]] [--] [PROGRAM_ARG1 ...]
The following single-character options are accepted:
With arguments: -j
Boolean (without arguments): -h -v -V -I -g -G -C -A -D -O -l -L -a -r -p -P -J -w -T -c -f -i -m -t -u
Options may be merged together. -- stops processing of options.
Space is not required between options and their arguments.
For more details run
perldoc -F C:\Perl64\bin/cpan.bat
[Now continuing due to backward compatibility and excessive paranoia.
See 'perldoc Getopt::Std' about $Getopt::Std::STANDARD_HELP_VERSION.]
Nothing to install!
有人知道我做错了什么吗？