anchor.diff:  RUN yum install -y nodejs npm && yum clean packages
   RUN npm install -g gulp
   
  -RUN mkdir -p $WORKDIR
  -RUN mkdir -p $SECRETS
  +# Getting Go.
  +ENV GO_VERSION go1.5.2
  +ENV GOROOT /usr/local/go
  +ENV GOPATH /
  +
  +ENV PATH $PATH:$GOROOT/bin
  +
  +ENV GO_PACKAGE_URL https://storage.googleapis.com/golang/$GO_VERSION.linux-amd64.tar.gz
  +RUN curl -sSL $GO_PACKAGE_URL | tar -xvzf - -C /usr/local
   
   # Expect the $WORKDIR volume to be mounted.
   VOLUME [ "$WORKDIR" ]
  
positive.code: FROM fedora:21
  MAINTAINER "The Lantern Team" <team@getlantern.org>
  
  ENV GO_VERSION go1.5
  ENV GOROOT /usr/local/go
  ENV GOPATH /
  
  ENV PATH $PATH:$GOROOT/bin
  
  ENV WORKDIR /lantern
  ENV SECRETS /secrets
  
  # Go binary for bootstrapping.
  ENV GO_PACKAGE_URL https://storage.googleapis.com/golang/go1.5.2.linux-amd64.tar.gz
  
  # Updating system.
  RUN yum update -y && yum makecache && yum clean packages
  
negative.code: 
  # Compilers and tools for CGO.
  RUN yum install -y gcc gcc-c++ libgcc.i686 gcc-c++.i686 pkg-config && yum clean packages
  
  # Requisites for bootstrapping.
  RUN yum install -y glibc-devel glibc-static && yum clean packages
  