anchor.diff:  	&& make \
   	&& make install \
   	&& make clean \
  -	&& cd /root ; rm -rf /root/vsearch-2* 
  +	&& cd /root ; rm -rf vsearch-2* v2*.tar.gz
  +
  +### install skewer
  +RUN cd /root \
  +    && git clone https://github.com/relipmoc/skewer \
  +    && cd skewer \
  +    && make \
  +    && make install \
  +    && make clean \
  +    && cd /root ; rm -rf skewer
  +
  +### install autoskewer
  +RUN cd /root \
  +    git clone http://github.com/MG-RAST/autoskewer \
  +    && cd autoskewer \
  +    && make
  +ENV PATH /root/autoskewer/:$PATH
   
   ### install CWL runner
   RUN pip install cwlref-runner
  
positive.code: # MG-RAST dockerfiles
  
  FROM	debian
  MAINTAINER The MG-RAST team
  
  ENV DEBIAN_FRONTEND noninteractive
  
negative.code: ### install DIAMOND
  RUN cd /root \
  	&& git clone https://github.com/bbuchfink/diamond.git \
  	&& cd diamond \
  	&& sh ./build_simple.sh \
  	&& install -s -m555 diamond /usr/local/bin \
  	&& cd /root ; rm -rf diamond
  
  ### install swarm 2.1.9
  RUN cd /root \
  