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