Golang Dep无法读取元数据

I use this command:

dep init -gopath -v

in my gopath,like this:

gopath/src/aaa.com/bbb/ccc.v2

in my code, import is:

import ("aaa.com/bbb/ccc.v2")

final got this:

init failed: unable to determine direct dependencies: unable to deduce 
repository and source type for "aaa.com/bbb/ccc.v2": unable to 
read metadata: unable to fetch raw metadata: failed HTTP request to URL 
"http://aaa.com/bbb/ccc.v2?go-get=1": Get http://aaa.com/bbb/ccc.v2?go-get=1: context canceled

actually,aaa.com don`t exists,it just a dir in my gopath

WHY dep still request the network to get metadata even if I specified the -gopath param?