Gentoo出现套餐冲突

我试图在我的Gentoonetworking服务器上安装git。 命令“emerge dev-vcs / git”返回以下结果：

* IMPORTANT: 12 news items need reading for repository 'gentoo'. * Use eselect news read to view new items. * IMPORTANT: 5 config files in '/etc/portage' need updating. * See the CONFIGURATION FILES section of the emerge * man page to learn how to update config files. Calculating dependencies... done! [ebuild N ] perl-core/parent-0.228-r1 [ebuild N ] perl-core/Data-Dumper-2.154.0 [ebuild N ] virtual/perl-parent-0.228-r1 [ebuild N ] virtual/perl-Data-Dumper-2.154.0 [ebuild U #] dev-lang/perl-5.20.2 [5.16.3] USE="-berkdb*" [ebuild N ] dev-perl/Net-SMTP-SSL-1.10.0-r1 [ebuild N ] virtual/perl-if-0.60.300 [ebuild N ] virtual/perl-Exporter-5.710.0-r1 [ebuild N ] virtual/perl-Carp-1.330.100 [ebuild N ] perl-core/CGI-4.90.0 USE="{-test}" [ebuild N ] virtual/perl-CGI-4.90.0 [ebuild N ] dev-perl/Error-0.170.210 USE="{-test}" [ebuild N ] dev-vcs/git-2.3.1 USE="blksha1 cgi curl gpg iconv nls pcre perl python threads webdav -cvs -doc -emacs -gnome-keyring -gtk -highlight -mediawiki (-ppcsha1) -subversion {-test} -tk -xinetd" PYTHON_TARGETS="python2_7" !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: dev-lang/perl:0 (dev-lang/perl-5.16.3:0/5.16::gentoo, installed) pulled in by =dev-lang/perl-5.16* required by (virtual/perl-libnet-1.230.0:0/0::gentoo, installed) ^ ^^^^^ dev-lang/perl:0/5.16=[-build(-)] required by (perl-core/File-Temp-0.230.400-r1:0/0::gentoo, installed) ^^^^^^^^ (and 12 more with the same problems) (dev-lang/perl-5.20.2:0/5.20::gentoo, ebuild scheduled for merge) pulled in by =dev-lang/perl-5.20* required by (virtual/perl-Carp-1.330.100:0/0::gentoo, ebuild scheduled for merge) ^ ^^^^^ (and 2 more with the same problem) It may be possible to solve this problem by using package.mask to prevent one of those packages from being selected. However, it is also possible that conflicting dependencies exist such that they are impossible to satisfy simultaneously. If such a conflict exists in the dependencies of two different packages, then those packages can not be installed simultaneously. You may want to try a larger value of the --backtrack option, such as --backtrack=30, in order to see if that will solve this conflict automatically. For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. 

在这之后，我尝试“emerge dev-lang / perl”，但它返回相同的错误。 任何小费？ 多谢你们 ！