如何使用dep for golang处理嵌套的供应商文件夹

Question

I have an application A which imports other application B and C. So B and C both appear in the vendor directory of A.

Also, application B imports C.

When go build, it complains that

Cannot use someType (type "application-a/vendor/application-c".someType) as type "application-b/vendor/application-c".someType in...