A variant of How can I SSH into the Beta's MobyLinuxVM is to use nsenter on PID 1. Build a Docker image that has nsenter inside, like this:
FROM alpine
MAINTAINER You <you@example.com>
RUN apk update && \
apk add util-linux && \
rm -rf /var/cache/apk/*
ENTRYPOINT ["nsenter", "--target", "1", "--mount", "--uts", "--ipc", "--net", "--pid"]
Then you can “docker build . -t hostenter” and enter the host with “docker run --rm -it --privileged --pid=host hostenter”:
PS C:\Users\You> docker run -it --privileged --pid=host hostenter
moby:/#
I was able to add the mfsymlinks option to my Windows mounts using this approach.