The following actions will be performed:
  - install callipyge 0.2

=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[callipyge: http] Command started
[callipyge: http] Command started
[callipyge.0.2] https://github.com/oklm-wsh/callipyge/releases/download/v0.2/callipyge-0.2.tbz downloaded

=-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[callipyge: dune build] Command started
+ dune "build" "-p" "callipyge" "-j" "4" (CWD=/home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/callipyge.0.2)
-       ocamlc lib/.callipyge.objs/callipyge.{cmo,cmt} (exit 2)
- (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlc.opt -w -40 -g -bin-annot -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmo -c -impl lib/callipyge.ml)
- File "lib/callipyge.ml", line 323, characters 7-22:
- Error: Unbound value Fmt.invalid_arg
-     ocamlopt lib/.callipyge.objs/callipyge.{cmx,o} (exit 2)
- (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlopt.opt -w -40 -g -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmx -c -impl lib/callipyge.ml)
- File "lib/callipyge.ml", line 323, characters 7-22:
- Error: Unbound value Fmt.invalid_arg
-       ocamlc lib/.callipyge.objs/callipyge.{cmo,cmt} (exit 2)
- (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlc.opt -w -40 -g -bin-annot -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmo -c -impl lib/callipyge.ml)
- File "lib/callipyge.ml", line 323, characters 7-22:
- Error: Unbound value Fmt.invalid_arg
-     ocamlopt lib/.callipyge.objs/callipyge.{cmx,o} (exit 2)
- (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlopt.opt -w -40 -g -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmx -c -impl lib/callipyge.ml)
- File "lib/callipyge.ml", line 323, characters 7-22:
- Error: Unbound value Fmt.invalid_arg
[ERROR] The compilation of callipyge failed at "dune build -p callipyge -j 4".

#=== ERROR while installing callipyge.0.2 =====================================#
# opam-version         1.2.2+dd (3852ba0a7708d4dc37f64dd4cd00f873bf317ac0)
# os                   linux
# command              dune build -p callipyge -j 4
# path                 /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/callipyge.0.2
# 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/callipyge.0.2/callipyge-13153.env
# stdout-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/callipyge.0.2/callipyge-13153.out
# stderr-file          /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/build/callipyge.0.2/callipyge-13153.out
### stdout ###
#       ocamlc lib/.callipyge.objs/callipyge.{cmo,cmt} (exit 2)
# (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlc.opt -w -40 -g -bin-annot -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmo -c -impl lib/callipyge.ml)
# File "lib/callipyge.ml", line 323, characters 7-22:
# Error: Unbound value Fmt.invalid_arg
#     ocamlopt lib/.callipyge.objs/callipyge.{cmx,o} (exit 2)
# (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlopt.opt -w -40 -g -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmx -c -impl lib/callipyge.ml)
# File "lib/callipyge.ml", line 323, characters 7-22:
# Error: Unbound value Fmt.invalid_arg
### stderr ###
#       ocamlc lib/.callipyge.objs/callipyge.{cmo,cmt} (exit 2)
# (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlc.opt -w -40 -g -bin-annot -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmo -c -impl lib/callipyge.ml)
# File "lib/callipyge.ml", line 323, characters 7-22:
# Error: Unbound value Fmt.invalid_arg
#     ocamlopt lib/.callipyge.objs/callipyge.{cmx,o} (exit 2)
# (cd _build/default && /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/bin/ocamlopt.opt -w -40 -g -I lib/.callipyge.objs -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/eqaf -I /home/doligez/opamcheck/sandbox2/opamstate/4.07.0+24fac73/dotopam/4.07.0+24fac73/lib/fmt -intf-suffix .ml -no-alias-deps -open Callipyge__ -o lib/.callipyge.objs/callipyge.cmx -c -impl lib/callipyge.ml)
# File "lib/callipyge.ml", line 323, characters 7-22:
# Error: Unbound value Fmt.invalid_arg



=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
The following actions failed
  - install callipyge 0.2
No changes have been performed
'opam install callipyge.0.2' failed.