fswatch_async 11-0.1.2

Error log

The package failed to build. The error log from opam follows.

Opam plugin "depext" may require upgrading/reinstalling. Reinstall the plugin on the current switch? [Y/n] y
The following actions will be performed:
  - recompile opam-depext 1.2.3

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved opam-depext.1.2.3  (cached)
-> removed   opam-depext.1.2.3
-> installed opam-depext.1.2.3
Done.

<><> opam-depext.1.2.3 installed successfully <><><><><><><><><><><><><><><><><>
=> opam-depext is unnecessary when used with opam >= 2.1. Please use opam install directly instead
# Run eval $(opam env) to update the current shell environment

<><> Carrying on to "opam depext -viy fswatch_async.11-0.1.2 variantslib.v0.17.0 uopt.v0.17.0 typerep.v0.17.0 topkg.1.0.7 timezone.v0.17.0 time_now.v0.17.0 stdlib-shims.0.3.0 stdio.v0.17.0 splittable_random.v0.17.0 spawn.v0.15.1 sexplib0.v0.17.0 sexplib.v0.17.0 sexp_pretty.v0.17.0 seq.base re.1.12.0 ppxlib_jane.v0.17.0 ppxlib.0.33.0 ppx_variants_conv.v0.17.0 ppx_typerep_conv.v0.17.0 ppx_tydi.v0.17.0 ppx_string_conv.v0.17.0 ppx_string.v0.17.0 ppx_stable_witness.v0.17.0 ppx_stable.v0.17.0 ppx_sexp_value.v0.17.0 ppx_sexp_message.v0.17.0 ppx_sexp_conv.v0.17.0 ppx_pipebang.v0.17.0 ppx_optional.v0.17.0 ppx_optcomp.v0.17.0 ppx_module_timer.v0.17.0 ppx_log.v0.17.0 ppx_let.v0.17.0 ppx_jane.v0.17.0 ppx_inline_test.v0.17.0 ppx_ignore_instrumentation.v0.17.0 ppx_here.v0.17.0 ppx_hash.v0.17.0 ppx_globalize.v0.17.0 ppx_fixed_literal.v0.17.0 ppx_fields_conv.v0.17.0 ppx_expect.v0.17.0 ppx_enumerate.v0.17.0 ppx_disable_unused_warnings.v0.17.0 ppx_diff.v0.17.0 ppx_derivers.1.2.1 ppx_custom_printf.v0.17.0 ppx_compare.v0.17.0 ppx_cold.v0.17.0 ppx_bin_prot.v0.17.0 ppx_bench.v0.17.0 ppx_base.v0.17.0 ppx_assert.v0.17.0 parsexp.v0.17.0 ocamlfind.1.9.6 ocamlbuild.0.15.0 ocaml_intrinsics_kernel.v0.17.1 ocaml-compiler-libs.v0.12.4 num.1.5-1 jst-config.v0.17.0 jane-street-headers.v0.17.0 int_repr.v0.17.0 gel.v0.17.0 fswatch.11-0.1.4 fmt.0.9.0 fieldslib.v0.17.0 expect_test_helpers_core.v0.17.0 dune-configurator.3.16.0 dune.3.16.0 cstruct.6.2.0 csexp.1.5.2 core_unix.v0.17.0 core_kernel.v0.17.0 core.v0.17.1 conf-fswatch.11-0.1.3 capitalization.v0.17.0 bin_prot.v0.17.0 base_quickcheck.v0.17.0 base_bigstring.v0.17.0 base.v0.17.1 async_unix.v0.17.0 async_kernel.v0.17.0" 

Since version 2.1, opam now handles external dependencies alongside OCaml ones, and the `depext` plugin interface is provided for backwards compatibility only. Consider using your usual `opam install` command to install both OCaml and system dependencies, or `opam install <pkg> --depext-only` if you want to only install external dependencies.
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for fswatch_async.11-0.1.2 & variantslib.v0.17.0 & uopt.v0.17.0 & typerep.v0.17.0 & topkg.1.0.7 & timezone.v0.17.0 & time_now.v0.17.0 & stdlib-shims.0.3.0 & stdio.v0.17.0 & splittable_random.v0.17.0 & spawn.v0.15.1 & sexplib0.v0.17.0 & sexplib.v0.17.0 & sexp_pretty.v0.17.0 & seq.base & re.1.12.0 & ppxlib_jane.v0.17.0 & ppxlib.0.33.0 & ppx_variants_conv.v0.17.0 & ppx_typerep_conv.v0.17.0 & ppx_tydi.v0.17.0 & ppx_string_conv.v0.17.0 & ppx_string.v0.17.0 & ppx_stable_witness.v0.17.0 & ppx_stable.v0.17.0 & ppx_sexp_value.v0.17.0 & ppx_sexp_message.v0.17.0 & ppx_sexp_conv.v0.17.0 & ppx_pipebang.v0.17.0 & ppx_optional.v0.17.0 & ppx_optcomp.v0.17.0 & ppx_module_timer.v0.17.0 & ppx_log.v0.17.0 & ppx_let.v0.17.0 & ppx_jane.v0.17.0 & ppx_inline_test.v0.17.0 & ppx_ignore_instrumentation.v0.17.0 & ppx_here.v0.17.0 & ppx_hash.v0.17.0 & ppx_globalize.v0.17.0 & ppx_fixed_literal.v0.17.0 & ppx_fields_conv.v0.17.0 & ppx_expect.v0.17.0 & ppx_enumerate.v0.17.0 & ppx_disable_unused_warnings.v0.17.0 & ppx_diff.v0.17.0 & ppx_derivers.1.2.1 & ppx_custom_printf.v0.17.0 & ppx_compare.v0.17.0 & ppx_cold.v0.17.0 & ppx_bin_prot.v0.17.0 & ppx_bench.v0.17.0 & ppx_base.v0.17.0 & ppx_assert.v0.17.0 & parsexp.v0.17.0 & ocamlfind.1.9.6 & ocamlbuild.0.15.0 & ocaml_intrinsics_kernel.v0.17.1 & ocaml-compiler-libs.v0.12.4 & num.1.5-1 & jst-config.v0.17.0 & jane-street-headers.v0.17.0 & int_repr.v0.17.0 & gel.v0.17.0 & fswatch.11-0.1.4 & fmt.0.9.0 & fieldslib.v0.17.0 & expect_test_helpers_core.v0.17.0 & dune-configurator.3.16.0 & dune.3.16.0 & cstruct.6.2.0 & csexp.1.5.2 & core_unix.v0.17.0 & core_kernel.v0.17.0 & core.v0.17.1 & conf-fswatch.11-0.1.3 & capitalization.v0.17.0 & bin_prot.v0.17.0 & base_quickcheck.v0.17.0 & base_bigstring.v0.17.0 & base.v0.17.1 & async_unix.v0.17.0 & async_kernel.v0.17.0:   * Missing dependency:
            - conf-fswatch
            depends on the unavailable system package 'libfswatch-dev'. Use `--no-depexts' to attempt installation anyway, or it is possible that a depext package name in the opam file is incorrect.


Command failed: opam --cli=2.1 list --readonly --external '--resolve=fswatch_async.11-0.1.2,variantslib.v0.17.0,uopt.v0.17.0,typerep.v0.17.0,topkg.1.0.7,timezone.v0.17.0,time_now.v0.17.0,stdlib-shims.0.3.0,stdio.v0.17.0,splittable_random.v0.17.0,spawn.v0.15.1,sexplib0.v0.17.0,sexplib.v0.17.0,sexp_pretty.v0.17.0,seq.base,re.1.12.0,ppxlib_jane.v0.17.0,ppxlib.0.33.0,ppx_variants_conv.v0.17.0,ppx_typerep_conv.v0.17.0,ppx_tydi.v0.17.0,ppx_string_conv.v0.17.0,ppx_string.v0.17.0,ppx_stable_witness.v0.17.0,ppx_stable.v0.17.0,ppx_sexp_value.v0.17.0,ppx_sexp_message.v0.17.0,ppx_sexp_conv.v0.17.0,ppx_pipebang.v0.17.0,ppx_optional.v0.17.0,ppx_optcomp.v0.17.0,ppx_module_timer.v0.17.0,ppx_log.v0.17.0,ppx_let.v0.17.0,ppx_jane.v0.17.0,ppx_inline_test.v0.17.0,ppx_ignore_instrumentation.v0.17.0,ppx_here.v0.17.0,ppx_hash.v0.17.0,ppx_globalize.v0.17.0,ppx_fixed_literal.v0.17.0,ppx_fields_conv.v0.17.0,ppx_expect.v0.17.0,ppx_enumerate.v0.17.0,ppx_disable_unused_warnings.v0.17.0,ppx_diff.v0.17.0,ppx_derivers.1.2.1,ppx_custom_printf.v0.17.0,ppx_compare.v0.17.0,ppx_cold.v0.17.0,ppx_bin_prot.v0.17.0,ppx_bench.v0.17.0,ppx_base.v0.17.0,ppx_assert.v0.17.0,parsexp.v0.17.0,ocamlfind.1.9.6,ocamlbuild.0.15.0,ocaml_intrinsics_kernel.v0.17.1,ocaml-compiler-libs.v0.12.4,num.1.5-1,jst-config.v0.17.0,jane-street-headers.v0.17.0,int_repr.v0.17.0,gel.v0.17.0,fswatch.11-0.1.4,fmt.0.9.0,fieldslib.v0.17.0,expect_test_helpers_core.v0.17.0,dune-configurator.3.16.0,dune.3.16.0,cstruct.6.2.0,csexp.1.5.2,core_unix.v0.17.0,core_kernel.v0.17.0,core.v0.17.1,conf-fswatch.11-0.1.3,capitalization.v0.17.0,bin_prot.v0.17.0,base_quickcheck.v0.17.0,base_bigstring.v0.17.0,base.v0.17.1,async_unix.v0.17.0,async_kernel.v0.17.0' --color=never returned 20