StaticSrcUri: version 2.1.2-r1: '2.1' in SRC_URI, replace with $(ver_cut 1-2)
  HttpsUrlAvailable: version 2.1.3: HOMEPAGE: HTTPS url available: http://opam.ocaml.org/ -> https://opam.ocaml.org/
  StaticSrcUri: version 2.1.3: '2.1' in SRC_URI, replace with $(ver_cut 1-2)