(CommandList
  children: [
    (C {(export)} {(Lit_VarLike "DEBIAN_FRONTEND=") (noninteractive)})
    (C {(apt-get)} {(update)})
    (C {(apt-get)} {(install)} {(-y)} {(-q)} {(python-dev)} {(unzip)})
    (C {(chmod)} {(Lit_Other "+") (x)} {(run-tests.sh)})
  ]
)