Ubuntu里面建立Packages.gz包，为什么报这个错误啊？

root@ubuntu:~# dpkg-scanpackages packs /dev/null |gzip > packs/Packages.gz
Can't locate Dpkg/ErrorHandling.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at /usr/local/bin/dpkg-scanpackages line 25.
BEGIN failed--compilation aborted at /usr/local/bin/dpkg-scanpackages line 25.
root@ubuntu:~# BEGIN failed--compilation aborted at /usr/local/bin/dpkg-scanpackages line 25.
BEGIN: command not found
root@ubuntu:~#


大家帮我看看啊，着急，在线等

打包呢？
dpkg-scanpackages packs /dev/null |gzip - > packs/Packages.gz
gzip后加一个 - 试试