gom build/run can't find libs when they installed with $GO15VENDOREXPERIMENT=1

[achiku]

@hnakamur @mattn First of all, thank you for open-sourcing such a cool library! I was really happy when I found gom supports GO15VENDOREXPERIMENT, but here is my problem. The below is repro process.

https://github.com/achiku/sample-golang-packaging-gom

$ go version
go version go1.5.1 darwin/amd64

$ echo $GO15VENDOREXPERIMENT
1
$ go get github.com/mattn/gom
$ git clone git@github.com:achiku/sample-golang-packaging-gom.git 
$ cd sample-golang-packaging-gom
$ gom install
$ find vendor -type d -maxdepth 2
vendor
vendor/github.com
vendor/github.com/fatih
vendor/github.com/mattn
vendor/github.com/shiena
vendor/pkg
vendor/pkg/darwin_amd64
$ gom run main.go  # it fails
$ gom build  # it fails

$ mkdir vendor/src
$ mv vendor/github.com vendor/src
$ gom run main.go
Hello, world!
$ gom build  # it succeeds

Is there any reason to move vendor/src to vendor after building libraries installed by gom install? (GO15VENDORINGEXPERIMENT is introduced in this pr https://github.com/mattn/gom/pull/57) It seems like plain go build can also search for vendor/src if GO15VENDORINGEXPERIMENT is on, so leaving libraries in vendor/src seems ok to me. I'm pretty new to golang, so might be missing something important.

[mattn]

AFAIK, GO15VENDOREXPERIMENT only works if the sources are inside $GOPATH.

[achiku]

That's right... I tried exactly the same process in $GOPATH and it worked perfectly. Thanks!