anchor.diff:      "rustc --version | head -n 1" \
       "scala -version | head -n 1" \
       "tsc -v | head -n 1" \
  -    #"xbuild --version | head -n 1" \
       > show_versions \
     && rm -rf /tmp/ \
     && cat show_versions \
  
positive.code:     make \
      maven \
      mono-complete \
      mono-dmcs \
      #mono-gmcs \
      nodejs \
      ocaml-nox \
      openjdk-8-jdk \
  
negative.code:     "clisp --version | head -n 1" \
      "coffee -v | head -n 1" \
      "dmd --version | head -n 1" \
      "gcc --version | head -n 1" \
      "gdc --version | head -n 1" \
      "g++ --version | head -n 1" \
  