fixes 'whch docker' on mac osx, https://github.com/magneticio/vamp/issues/597
fixes 'whch docker' on mac osx, https://github.com/magneticio/vamp/issues/597

magneticio/vamp.io,magneticio/vamp.io,gavinzhou/vamp.io,gavinzhou/vamp.io,magneticio/vamp.io,gavinzhou/vamp.io