google.golang.org/appengineappengine/...
2016/01/14 14:32:43 go-app-builder: build timing: 2×6g (113ms total), 0×6l (0 total)
2016/01/14 14:32:43 go-app-builder: failed running 6g: exit status 1

server/alexa.go:10: can't find import: "golang.org/x/net/context"

golang.org/x/net/contextappengine/contextGOROOT

I tried including all the dependencies and their dependencies in my package repo but that only lead me to this obscure error (the directory it's complaining about actually exists):

2016/01/14 14:27:04 go-app-builder: build timing: 18×6g (1.819s total), 0×6l (0 total)
2016/01/14 14:27:04 go-app-builder: failed running 6g: exit status 1

github.com/golang/protobuf/protoc-gen-go/testdata/my_test/test.pb.go:27: can't find import: "github.com/golang/protobuf/protoc-gen-go/testdata/multi"

Have I misunderstood the documentation and am only supposed to use the old packages?