VSCode符号重命名不适用于Go

Whenever I attempt to use "Rename Symbol" in VSCode while editing a Go project, it fails. Based on the error messages, it looks like it's only using GOROOT, and ignoring everything under GOPATH.

When I first tried using it, it gave me the following error:

Cannot rename due to errors: /usr/local/go/src/net/interface_bsd.go:12:2: could not import golang_org/x/net/route (cannot find package "golang_org/x/net/route" in any of: /usr/local/go/src/golang_org/x/net/route (from $GOROOT).

This package was present under GOPATH. I copied the entire "golang.org" directory to GOROOT/src, and renamed to "golang_org". That eliminated that error, but now I'm getting errors regarding my own project's packages "not found".

Everything else in my GO development system and VS Code is working OK... auto reformat on save, errors, Intellisense, etc.

go env:

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/james/Dropbox/Development/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

System & Editor:

MacOS 10.10.5
go version go1.7.4 darwin/amd64
VSCode 1.7.2

VS Code Extensions:

https://marketplace.visualstudio.com/items?itemName=lukehoban.Go (0.6.51)  
Dash 1.1.2