需要 openSUSE Tumbleweed ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Tests/openSUSE_Tumbleweed/Virtualization:Tests.repo
zypper refresh
zypper install perl-XML-SAX-Writer
需要 16.0 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Tests/16.0/Virtualization:Tests.repo
zypper refresh
zypper install perl-XML-SAX-Writer
需要 15.7 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Tests/15.7/Virtualization:Tests.repo
zypper refresh
zypper install perl-XML-SAX-Writer
需要 15.6 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Tests/15.6/Virtualization:Tests.repo
zypper refresh
zypper install perl-XML-SAX-Writer
需要 15.5 ，用 root 執行：
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Tests/15.5/Virtualization:Tests.repo
zypper refresh
zypper install perl-XML-SAX-Writer