anchor.diff:  &&	fixperms
   
   # build current release into /usr/local/go using 1.4 for bootstrap
  -ENV	_DKR_GO_RELEASE 1.9
  -ENV	_DKR_BUMP 2
  +ARG	_DKR_GO_RELEASE=1.9
   RUN	git clone --branch release-branch.go${_DKR_GO_RELEASE} --reference /usr/local/go-tip https://go.googlesource.com/go /usr/local/go \
   &&	cd /usr/local/go/src \
   &&	GOROOT_BOOTSTRAP=/usr/local/go1.4 ./make.bash \
  
positive.code: &&	update-alternatives --set vi /usr/local/bin/vim
  ENV	EDITOR vim
  
  ENV	_DKR_VIMGO_VERSION v1.15
  RUN	mkdir -p /etc/skel/.vim/autoload \
  &&	mkdir -p /etc/skel/.vim/bundle \
  &&	curl -LSso /etc/skel/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim \
  
negative.code: ENV	PATH /usr/local/go/bin:$PATH
  
  # build tip into go-tip, using current release as bootstrap
  RUN	cd /usr/local/go-tip/src \
  &&	git checkout master \
  &&	git pull \
  