The following actions will be performed:
  - install conf-hidapi 0

=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

=-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[conf-hidapi: pkg-config hidapi-libusb] Command started
+ pkg-config "hidapi-libusb" (CWD=/home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/conf-hidapi.0)
[ERROR] The compilation of conf-hidapi failed at "pkg-config hidapi-libusb".

#=== ERROR while installing conf-hidapi.0 =====================================#
# opam-version         1.2.2+dd (3852ba0a7708d4dc37f64dd4cd00f873bf317ac0)
# os                   linux
# command              pkg-config hidapi-libusb
# path                 /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/conf-hidapi.0
# compiler             4.07.0+24fac73
# exit-code            1
# env-file             /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/conf-hidapi.0/conf-hidapi-16639.env
# stdout-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/conf-hidapi.0/conf-hidapi-16639.out
# stderr-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/conf-hidapi.0/conf-hidapi-16639.out



=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
The following actions failed
  - install conf-hidapi 0
No changes have been performed

=-=- conf-hidapi.0 troobleshooting =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
=> This package relies on external (system) dependencies that may be missing.
   `opam depext conf-hidapi.0' may help you find the correct installation for
   your system.
'opam install conf-hidapi.0' failed.