anchor.diff:      gdc \
       golang \
       ldc \
  +    llvm \
       make \
       maven \
       nodejs \
  
positive.code:   "node -v | head -n 1" \
    "java -version | head -n 1" \
    "javac -version | head -n 1" \
    "ldc2 --version | head -n 1" \
    "python -V | head -n 1" \
    "python3 -V | head -n 1" \
  
negative.code: COPY show_versions.sh /tmp/
  
  RUN bash /tmp/show_versions.sh \
    "clang --version | head -n 1" \
    "dmd --version | head -n 1" \
    "gcc --version | head -n 1" \
    "gdc --version | head -n 1" \
  