anchor.diff:  
   # Python
   RUN add-apt-repository ppa:jonathonf/python-3.6
  -RUN apt-get update
  -RUN apt-get install python3.6 --assume-yes
  +RUN apt-get -y update
  +RUN apt-get -y install python3.6 --assume-yes
   RUN curl https://bootstrap.pypa.io/get-pip.py | python3.6
   RUN pip3.6 install mypy python-dateutil
   
   # Dart
  -RUN apt-get install apt-transport-https
  +RUN apt-get -y install apt-transport-https
   RUN sh -c 'curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -'
   RUN sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list'
  -RUN apt-get update
  -RUN apt-get install dart
  +RUN apt-get -y update
  +RUN apt-get -y install dart
   
   # Crystal
   RUN curl -sL "https://keybase.io/crystal/pgp_keys.asc" | apt-key add -
   RUN echo "deb https://dist.crystal-lang.org/apt crystal main" | tee /etc/apt/sources.list.d/crystal.list
  -RUN apt-get update
  -RUN apt-get install crystal --assume-yes
  +RUN apt-get -y update
  +RUN apt-get -y install crystal --assume-yes
   
   ENV PATH="${workdir}/node_modules/.bin:${PATH}"
   
  
positive.code: RUN mv microsoft.gpg /etc/apt/trusted.gpg.d/microsoft.gpg
  RUN sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-ubuntu-xenial-prod xenial main" > /etc/apt/sources.list.d/dotnetdev.list'
  
  RUN apt-get update
  RUN apt-get install nodejs maven default-jdk clang binutils golang-go --assume-yes
  RUN apt-get install dotnet-sdk-2.0.0 --assume-yes
  
  # Install Boost for C++
  RUN apt-get install libboost-all-dev --assume-yes
  RUN apt-get update && apt-get install software-properties-common python-software-properties --assume-yes
  RUN add-apt-repository ppa:jonathonf/gcc-7.1
  RUN apt-get update
  RUN apt-get install g++-7 --assume-yes
  RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60 --slave /usr/bin/g++ g++ /usr/bin/g++-7
  RUN update-alternatives --config gcc
  
  
negative.code: ENV PATH="/root/.cargo/bin:${PATH}"
  
  # Install Pike
  RUN apt-get -y update
  RUN apt-get -y install pike8.0-full --assume-yes
  
  # Tool to limit elm-make cores
  RUN git clone https://github.com/obmarg/libsysconfcpus.git
  RUN cd libsysconfcpus && ./configure && make && make install
  
  # Ruby
  RUN apt-get -y install ruby --assume-yes
  RUN gem install bundler
  
  # Kotlin
  