anchor.diff:  WORKDIR /usr/src
   # nighty-master 2015-05-04
   RUN git clone git://cmake.org/cmake.git CMake && \
  -  cd CMake \
  -  && git checkout 6cd6d50871ce28d0c72336a6aca01814487df5e1
  +  cd CMake && \
  +  git checkout 6cd6d50871ce28d0c72336a6aca01814487df5e1
   RUN mkdir CMake-build
   WORKDIR /usr/src/CMake-build
   RUN /usr/src/CMake/bootstrap \
  
positive.code:     --prefix=/usr && \
    make -j$(nproc) install && \
    rm -rf *
  
negative.code:   libssl-dev \
    make \
    ncurses-dev \
    pkg-config \
    python \
    rsync \
    sed \
    tar \
  