Switch.Overlayval dir : t -> OpamTypes.switch -> OpamTypes.dirnameSwitch metadata overlay (over the global metadata): $opam/$switch/overlay/
val package : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.dirnameSwitch metadata overlay (over the global metadata): $opam/$switch/overlay/$name.$version
val opam : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.filenameOPAM overlay: $opam/$switch/cache/$name.$version/opam
val tmp_opam : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.filenameOPAM temp overlay (for user editing): $opam/$switch/cache/$name.$version/opam_
val url : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.filenameURL overlay: $opam/$switch/overlay/$name.$version/url
val descr : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.filenameDescr orverlay
val files : t -> OpamTypes.switch -> OpamTypes.name -> OpamTypes.dirnameFiles overlay