✗ Solve failed — no dependency solution was found for this package version on Debian trixie, so it was never built. The solver's explanation:

Can't find all required versions.
Selected: astring.0.8.5 base-bigarray.base base-bytes.base base-domains.base
          base-nnp.base base-threads.base base-unix.base
          basement.v0.18~preview.130.106+341 camlp-streams.5.0.1
          capsule0.v0.18~preview.130.106+341 conf-autoconf.1
          conf-pkg-config.5 conf-which.1 cppo.1.8.0 csexp.1.5.2 cstruct.6.3.0
          cstruct-lwt.6.3.0 dune-configurator.3.24.2 duration.0.3.1
          fmt.0.11.0 io-page.3.0.0 jbuilder.transition logs.0.10.0 lwt.6.1.2
          mirage-channel-lwt.3.2.0 mirage-clock-lwt.2.0.0
          mirage-clock-unix.2.0.0 mirage-time-lwt.1.3.0 mtime.2.2.0
          nonempty_list_type.v0.18~preview.130.106+341 num.1.6
          ocaml-compiler-libs.v0.17.0+ox ocaml-config.3
          ocaml-options-vanilla.1 ocamlbuild.0.16.1+ox ocamlfind.1.9.8+ox
          ocplib-endian.1.2 odoc-parser.3.2.1+master.1791558161.c213704
          oxcaml.latest oxcaml-patch-guards.ox
          parsexp.v0.18~preview.130.106+341 ppx_derivers.1.2.1
          ppx_helpers.v0.18~preview.130.106+341
          ppx_js_style.v0.18~preview.130.106+341
          ppx_sexp_conv.v0.18~preview.130.106+341
          ppx_template.v0.18~preview.130.106+341 ppxlib_ast.0.33.0+ox2
          ppxlib_jane.v0.18~preview.130.106+341 result.1.5 rresult.0.7.0
          sexp_type.v0.18~preview.130.106+341
          sexplib.v0.18~preview.130.106+341
          sexplib0.v0.18~preview.130.106+341 stdlib-shims.0.3.0
          topkg.1.1.1+ox unique.v0.18~preview.130.106+341
          ocaml-variants&dns-forward-lwt-unix ocaml ocaml-base-compiler
          ocaml-base-compiler base-domains ocaml-base-compiler
          oxcaml-angstrom-patches
- dns -> (problem)
    dns-forward 0.9.0 requires < 2.0.0
    Rejected candidates:
      dns.10.2.6: Incompatible with restriction: < 2.0.0
      dns.10.2.5: Incompatible with restriction: < 2.0.0
      dns.10.2.4: Incompatible with restriction: < 2.0.0
      dns.10.2.3: Incompatible with restriction: < 2.0.0
      dns.10.2.2: Incompatible with restriction: < 2.0.0
      dns.10.2.1: Incompatible with restriction: < 2.0.0
      dns.10.2.0: Incompatible with restriction: < 2.0.0
      dns.10.1.0: Incompatible with restriction: < 2.0.0
      dns.9.1.0: Incompatible with restriction: < 2.0.0
      dns.8.0.0: Incompatible with restriction: < 2.0.0
      dns.7.0.3: Incompatible with restriction: < 2.0.0
      dns.6.4.0: Incompatible with restriction: < 2.0.0
      dns.6.3.0: Incompatible with restriction: < 2.0.0
      dns.5.0.1: Requires ocaml >= 4.07.0 & < 5.0
      dns.4.6.3: Requires ocaml >= 4.07.0 & < 5.0
      dns.4.4.1: Requires ocaml >= 4.07.0 & < 5.0
      dns.1.1.3: Requires ocaml >= 4.03.0 & < 5.0
      dns.1.1.1: Requires ocaml >= 4.03.0 & < 5.0
- dns-forward -> dns-forward.0.9.0
    dns-forward-lwt-unix 0.9.0 requires >= 0.9.0 & < 0.10.0
- dns-forward-lwt-unix -> dns-forward-lwt-unix.0.9.0
    User requested = 0.9.0
- dune -> (problem)
    basement v0.18~preview.130.106+341 requires >= 3.17.0
    Rejected candidates:
      dune.3.24.2: Requires jbuilder not(= transition)
      dune.3.24.1: Requires jbuilder not(= transition)
      dune.3.24.0: Requires jbuilder not(= transition)
      dune.3.23.1: Requires jbuilder not(= transition)
      dune.3.23.0: Requires jbuilder not(= transition)
      dune.3.22.2+ox: Requires jbuilder not(= transition)
      dune.3.22.2: Requires jbuilder not(= transition)
      dune.3.22.1: Requires jbuilder not(= transition)
      dune.3.22.0: Requires jbuilder not(= transition)
      dune.3.21.1: Requires jbuilder not(= transition)
      dune.3.21.0+ox: Requires jbuilder not(= transition)
      dune.3.21.0: Requires jbuilder not(= transition)
      dune.3.20.2+ox1: Requires jbuilder not(= transition)
      dune.3.20.2+ox: Requires jbuilder not(= transition)
      dune.3.20.2: Requires jbuilder not(= transition)
      dune.3.20.1: Requires jbuilder not(= transition)
      dune.3.20.0: Requires jbuilder not(= transition)
      dune.3.19.1: Requires jbuilder not(= transition)
      dune.3.19.0: Requires jbuilder not(= transition)
      dune.3.18.2: Requires jbuilder not(= transition)
      dune.3.17.2: Requires jbuilder not(= transition)
      dune.3.15.3: Incompatible with restriction: >= 3.17.0
      dune.3.12.2: Incompatible with restriction: >= 3.17.0
      dune.3.12.1: Incompatible with restriction: >= 3.17.0
      dune.3.10.0: Incompatible with restriction: >= 3.17.0
      dune.3.6.2: Incompatible with restriction: >= 3.17.0
      dune.3.5.0: Incompatible with restriction: >= 3.17.0
      dune.2.9.3: Incompatible with restriction: >= 3.17.0
      dune.2.7.1: Incompatible with restriction: >= 3.17.0
      dune.2.6.1: Incompatible with restriction: >= 3.17.0
      dune.2.5.1: Incompatible with restriction: >= 3.17.0
      dune.2.4.0: Incompatible with restriction: >= 3.17.0
      dune.2.3.0: Incompatible with restriction: >= 3.17.0
      dune.1.11.4: Incompatible with restriction: >= 3.17.0
      dune.1.6.3: Incompatible with restriction: >= 3.17.0
- io-page-unix -> (problem)
    Rejected candidates:
      io-page-unix.2.3.0: Requires io-page = 2.3.0
      io-page-unix.2.2.0: Requires io-page < 3.0.0
      io-page-unix.2.1.0: Requires io-page >= 2.1.0 & < 3.0.0
- ipaddr -> (problem)
    dns-forward 0.9.0 requires < 3.0.0
    Rejected candidates:
      ipaddr.5.6.2: Incompatible with restriction: < 3.0.0
      ipaddr.5.6.1: Incompatible with restriction: < 3.0.0
      ipaddr.5.6.0: Incompatible with restriction: < 3.0.0
      ipaddr.3.1.0: Incompatible with restriction: < 3.0.0
      ipaddr.2.9.0: Requires ocaml >= 4.03.0 & < 5.0
      ipaddr.2.8.0: Requires ocaml >= 4.03.0 & < 5.0
- mirage-channel -> mirage-channel.3.2.0
    mirage-channel-lwt 3.2.0 requires >= 3.0.0 & < 4.0.0
- mirage-clock -> mirage-clock.2.0.0
    mirage-clock-lwt 2.0.0 requires >= 1.2.0 & < 3.0.0
- mirage-device -> mirage-device.1.2.0
    mirage-clock 2.0.0 requires >= 1.0.0 & < 2.0.0
- mirage-flow -> mirage-flow.1.6.0
    mirage-channel 3.2.0 requires >= 1.2.0 & < 2.0.0
- mirage-flow-lwt -> (problem)
    Rejected candidates:
      mirage-flow-lwt.1.6.0: Requires cstruct >= 2.0.0 & < 6.1.0
- mirage-time -> mirage-time.1.3.0
    mirage-time-lwt 1.3.0 requires >= 1.0.0 & < 2.0.0
- ocaml -> ocaml.5.2.0
    User requested = 5.2.0
- ocaml-base-compiler -> (problem)
    Rejected candidates:
      ocaml-base-compiler.5.5.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.5.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.5.0~rc1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.5.0~beta1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.5.0~alpha3: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.5.0~alpha1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~rc1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~beta2: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~beta1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~alpha1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.3.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.2.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.2.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.1.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.1.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.0.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.4: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.3: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.2: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.2~rc1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.14.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.13.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.13.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.12.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.12.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.11.2: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.11.1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.4.11.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
- ocaml-variants -> ocaml-variants.5.2.0+ox
    User requested = 5.2.0+ox
- oxcaml-angstrom-patches -> (problem)
    Rejected candidates:
      oxcaml-angstrom-patches.enabled: Requires oxcaml-compiler not(< 5.4.0-ox1)
- oxcaml-compiler -> oxcaml-compiler.5.2.0minus39
    basement v0.18~preview.130.106+341 requires not(< 5.2.0minus39 | >= 5.4.0-ox1)
- ppxlib -> ppxlib.0.35.0
    ppx_helpers v0.18~preview.130.106+341 requires >= 0.33.0 & < 0.36.0

If you believe dns-forward-lwt-unix.0.9.0 should be installable on Debian trixie, please comment on the ocurrent/ocaml-docs-ci issues: find issue · report issue