Import Issue

When I attempt to build, this error occurs:

```
# github.com/hpcloud/tail/
../github.com/hpcloud/tail/tail.go:18: non-canonical import path "github.com/hpcloud/tail//vendor/gopkg.in/tomb.v1" (should be "github.com/hpcloud/tail/vendor/gopkg.in/tomb.v1")
../github.com/hpcloud/tail/tail.go:18: can't find import: "gopkg.in/tomb.v1"
```

Any idea how to fix this?
