The following actions will be performed:
  - install nsq 0.3.0

=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[nsq: http] Command started
[nsq: http] Command started
[nsq.0.3.0] https://github.com/ryanslade/nsq-ocaml/archive/0.3.0.tar.gz downloaded

=-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[nsq: jbuilder build] Command started
+ jbuilder "build" "-p" "nsq" "-j" "4" (CWD=/home/doligez/opamcheck/sandbox2/opamstate/4.07.0+pr2051/dotopam/4.07.0+pr2051/build/nsq.0.3.0)
-          ppx src/nsq.pp.ml (exit 1)
- (cd _build/default && .ppx/jbuild/ppx_compare+ppx_sexp_conv+ppx_deriving_yojson/ppx.exe --cookie 'library-name="nsq"' -o src/nsq.pp.ml --impl src/nsq.ml --dump-ast)
- File "src/nsq.ml", line 115, characters 16-41:
- Error: Ppxlib.Deriving: 'yojson' is not a supported type deriving generator
-          ppx src/nsq.pp.ml (exit 1)
- (cd _build/default && .ppx/jbuild/ppx_compare+ppx_sexp_conv+ppx_deriving_yojson/ppx.exe --cookie 'library-name="nsq"' -o src/nsq.pp.ml --impl src/nsq.ml --dump-ast)
- File "src/nsq.ml", line 115, characters 16-41:
- Error: Ppxlib.Deriving: 'yojson' is not a supported type deriving generator
[ERROR] The compilation of nsq failed at "jbuilder build -p nsq -j 4".

#=== ERROR while installing nsq.0.3.0 =========================================#
# opam-version         1.2.2+dd (3852ba0a7708d4dc37f64dd4cd00f873bf317ac0)
# os                   linux
# command              jbuilder build -p nsq -j 4
# path                 /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+pr2051/dotopam/4.07.0+pr2051/build/nsq.0.3.0
# compiler             4.07.0+pr2051
# exit-code            1
# env-file             /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+pr2051/dotopam/4.07.0+pr2051/build/nsq.0.3.0/nsq-2919.env
# stdout-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+pr2051/dotopam/4.07.0+pr2051/build/nsq.0.3.0/nsq-2919.out
# stderr-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+pr2051/dotopam/4.07.0+pr2051/build/nsq.0.3.0/nsq-2919.out
### stdout ###
#          ppx src/nsq.pp.ml (exit 1)
# (cd _build/default && .ppx/jbuild/ppx_compare+ppx_sexp_conv+ppx_deriving_yojson/ppx.exe --cookie 'library-name="nsq"' -o src/nsq.pp.ml --impl src/nsq.ml --dump-ast)
# File "src/nsq.ml", line 115, characters 16-41:
# Error: Ppxlib.Deriving: 'yojson' is not a supported type deriving generator
### stderr ###
#          ppx src/nsq.pp.ml (exit 1)
# (cd _build/default && .ppx/jbuild/ppx_compare+ppx_sexp_conv+ppx_deriving_yojson/ppx.exe --cookie 'library-name="nsq"' -o src/nsq.pp.ml --impl src/nsq.ml --dump-ast)
# File "src/nsq.ml", line 115, characters 16-41:
# Error: Ppxlib.Deriving: 'yojson' is not a supported type deriving generator



=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
The following actions failed
  - install nsq 0.3.0
No changes have been performed
'opam install nsq.0.3.0' failed.