The following actions will be performed:
  - install camltc 0.9.6

=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[camltc: git] Command started
[ERROR] The sources of the following couldn't be obtained, aborting:
          - camltc.0.9.6
        (This may be fixed by running 'opam update')
'opam install camltc.0.9.6' failed.