let muse =
  let url =
    "http://bioinformatics.mdanderson.org/Software/MuSE/MuSEv1.0b" in
  let binary = "MuSEv1.0b" in
  let install_program ~path =
    KEDSL.Program.( shf "chmod +x %s/%s" path binary) in
  let init_program ~path =
    KEDSL.Program.(shf "export muse_bin=%s/%s" path binary) in
  installable_tool Machine.Tool.Default.muse ~url
    ~install_program ~init_program
    ~witness:(witness_file binary)