Golang not building on WS 2016

Expected behavior

Building FROM golang:windowservercore succesfully.

Actual behavior

Docker gets hung (within Powershell) on
RUN go get .

Information

Dockerfile: https://pastebin.com/QS8DyKYf
Environment: WS 2016 with latest version of Docker

Steps to reproduce the behavior

docker build -t mdmcore:1.0.0 .