anchor.diff:  
   # C/C++ CMake Python
   
  -RUN RUN yum install -y  centos-release-scl && \
  -        yum install -y  devtoolset-7-gcc* \
  -                        devtoolset-7-valgrind \
  -                        devtoolset-7-gdb \
  -                        devtoolset-7-elfutils \
  -                        clang \
  -                        llvm-toolset-7 \
  -                        llvm-toolset-7-cmake \
  -                        rh-python36-python-pip \
  -                        rh-git29-git \
  -                        devtoolset-7-make
  +RUN yum install -y  centos-release-scl && \
  +    yum install -y  devtoolset-7-gcc* \
  +                    devtoolset-7-valgrind \
  +                    devtoolset-7-gdb \
  +                    devtoolset-7-elfutils \
  +                    clang \
  +                    llvm-toolset-7 \
  +                    llvm-toolset-7-cmake \
  +                    rh-python36-python-pip \
  +                    rh-git29-git \
  +                    devtoolset-7-make
   
   RUN echo "source scl_source enable devtoolset-7" >> /etc/bashrc
   RUN echo "source scl_source enable llvm-toolset-7" >> /etc/bashrc
   RUN echo "source scl_source enable rh-python36" >> /etc/bashrc
   RUN echo "source scl_source enable rh-git29" >> /etc/bashrc
  +RUN source /etc/bashrc
   
   RUN yum install -y qt5*devel
   RUN yum install -y gtk2-devel
  
positive.code: # Ninja builder
  
  RUN cd /tmp/ && wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm && \
     rpm -ivh epel-release-latest-7.noarch.rpm \
  RUN yum -y --enablerepo=epel install ninja-build && \
     echo "alias ninja='ninja-build'" >> /etc/bashrc
  RUN yum remove -y epel-release-7-11
  
  # Fish
  
  
negative.code: FROM nvidia/cuda:9.1-cudnn7-devel-centos7
  
  ENV LANG en_US.UTF-8
  ENV LANGUAGE en_US.UTF-8
  ENV LC_ALL en_US.UTF-8
  
  RUN yum groupinstall -y "Development tools"
  RUN yum install -y  wget \
                      unzip \
                      screen tmux \
  