anchor.diff:  FROM benchmark-ripser as benchmark-ripser-no-emergent
   
   WORKDIR /ripser/ripser
  -RUN git checkout benchmarks/disable-emergent-pairs \
  +RUN git pull && git checkout benchmarks/disable-emergent-pairs \
   && make
   
   WORKDIR /benchmark
  
positive.code: FROM benchmark-ripser as benchmark-ripser-store-reduced
  
  WORKDIR /ripser/ripser
  RUN git checkout benchmarks/store-reduced-matrix \
  && make
  
  WORKDIR /benchmark
  
negative.code: FROM benchmark-ripser as benchmark-ripser-use-reduced
  
  WORKDIR /ripser/ripser
  RUN git pull && git checkout benchmarks/use-reduced-matrix \
  && make
  
  WORKDIR /benchmark
  