Official documentation won't build

I can’t read online documentation at home so I need to build it in order to read it offline, but Hugo throws several errors.

I’m on ArchLinux 64bits.

hugo version
Hugo Static Site Generator v0.18.1 BuildDate: 2016-12-30T05:02:43-05:00

INFO: 2017/02/18 12:26:30 hugo.go:349: Using config file: /home/foo/public_html/Hugo/hugo-master/docs/config.toml
WARN: 2017/02/18 12:26:30 hugo.go:469: No theme set
INFO: 2017/02/18 12:26:30 hugo.go:493: /home/foo/public_html/Hugo/hugo-master/docs/static/ is the only static directory available to sync from
INFO: 2017/02/18 12:26:30 hugo.go:532: syncing static files to /
Started building sites ...
ERROR: 2017/02/18 12:26:30 template.go:495: Failed to add template index.html in path /home/foo/public_html/Hugo/hugo-master/docs/layouts/index.html: template: index.html:178: function "now" not defined
ERROR: 2017/02/18 12:26:30 template.go:529: template: index.html:178: function "now" not defined
WARN: 2017/02/18 12:26:30 template_i18n.go:63: No translation bundle found for default language "en"
ERROR: 2017/02/18 12:26:30 gitinfo.go:63: Failed to find GitInfo for "public_html/Hugo/hugo-master/docs/content/troubleshooting/strange-eof-error.md"
INFO: 2017/02/18 12:26:30 site.go:1489: found taxonomies: map[string]string{"tag":"tags", "group":"groups"}
WARN: 2017/02/18 12:26:30 template_i18n.go:45: Translation func for language en not found, use default.
WARN: 2017/02/18 12:26:30 template_i18n.go:45: Translation func for language en not found, use default.
  1. Your main problem is a versioning issue, try https://github.com/spf13/hugo/tree/release-docs
  2. If you don’t have Git installed, you may get rid of the Git errors by hugo --enableGitInfo=false

Thanks, that solved my problem.

Could you explain the issue in dept?

Sorry, no time.