% go run plotinum_sample.go ../lib/go/src/code.google.com/p/plotinum/vg/vgpdf/vgpdf.go:10:2: cannot find package "bitbucket.org/zombiezen/gopdf/pdf" in any of: /opt/local/go/src/pkg/bitbucket.org/zombiezen/gopdf/pdf (from $GOROOT) /Users/ikuo.kawaharada/lib/go/src/bitbucket.org/zombiezen/gopdf/pdf (from $GOPATH) ../lib/go/src/code.google.com/p/plotinum/vg/vgimg/vgimg.go:12:2: cannot find package "