[[!comment format=mdwn
 username="https://www.google.com/accounts/o8/id?id=AItOawmKyeW2G4jjSdnL1m6kPPtAiGFUBsnYCfY"
 nickname="FName"
 subject="How to install the trail package?"
 date="2012-08-09T00:11:26Z"
 content="""
I tried putting

trail 

in

    add_plugins => [qw{ 
    ...
    trail
    ...
    }]

in site.setup and rebuild.  It gives error

    Failed to load plugin IkiWiki::Plugin::trail: Can't locate IkiWiki/Plugin/trail.pm in @IN ...

"""]]
