(List
  (Com {[LIT_CHARS set]} {[LIT_CHARS -e]})
  (If
    (Com {[LIT_CHARS command]} {[LIT_CHARS -v]} {[LIT_CHARS lsb_release]}
      <
      (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT ">"> 1),
      >
    )
    (Case to_match={[ComSub (Com {[LIT_CHARS lsb_release]} {[LIT_CHARS -i]} {[LIT_CHARS -s]})]}, pat_word_list=[[{[LIT_CHARS Ubuntu]}]]
      (List
        (Com {[LIT_CHARS sudo]} {[LIT_CHARS apt-get]} {[LIT_CHARS install]} {[LIT_CHARS build-essential]} {[LIT_CHARS libpoppler-cpp-dev]} {[LIT_CHARS libfreetype6-dev]} {[LIT_CHARS libfontconfig-dev]} {[LIT_CHARS libpng12-dev]} {[LIT_CHARS libgif-dev]} {[LIT_CHARS libqt4-dev]} {[LIT_CHARS clang]})
        (If
          (Com {[LIT_OTHER "["]} {[ComSub (Com {[LIT_CHARS lsb_release]} {[LIT_CHARS -r]} {[LIT_CHARS -s]})]} {[LIT_OTHER "="]} {[SQ <LIT_CHARS 14.04>]} {[LIT_OTHER "]"]})
          (Com {[LIT_CHARS sudo]} {[LIT_CHARS apt-get]} {[LIT_CHARS install]} {[LIT_CHARS ninja-build]})
        )
        (Com {[LIT_CHARS exit]})
      )
    )
  )
  (Com {[LIT_CHARS echo]} {[SQ <LIT_CHARS "unknown system">]})
  (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
)