✗ 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: alcotest.1.9.1 alcotest-lwt.1.9.1 angstrom.0.16.1 astring.0.8.5
          base-bigarray.base base-bytes.base base-domains.base base-nnp.base
          base-threads.base base-unix.base base64.3.5.2
          basement.v0.18~preview.130.106+341 bigstringaf.0.10.0
          conf-autoconf.1 conf-libev.4-13 conf-which.1 cppo.1.8.0 csexp.1.5.2
          cstruct.6.3.0 dune.3.24.2 dune-configurator.3.24.2 faraday.0.8.2
          faraday-lwt.0.8.2 faraday-lwt-unix.0.8.2 fmt.0.11.0 hmap.0.8.1
          httpaf.0.7.1 httpaf-lwt-unix.0.7.1 logs.0.10.0 lwt.6.1.2
          lwt_ppx.6.1.0 magic-mime.1.3.1 mtime.2.2.0
          multipart-form-data.0.3.0 ocaml-compiler-libs.v0.17.0+ox
          ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0
          ocamlbuild.0.16.1+ox ocamlfind.1.9.8+ox ocplib-endian.1.2
          opium.0.20.0 oxcaml.latest oxcaml-patch-guards.ox
          ppx_derivers.1.2.1 ppxlib.0.39.0 ptime.1.2.0 re.1.14.0+ox
          result.1.5 rock.0.20.0 seq.base sexp_type.v0.18~preview.130.106+341
          sexplib0.v0.18~preview.130.106+341 stdlib-shims.0.3.0
          stringext.1.6.0 topkg.1.1.1+ox tyxml.5.0.0 uri.4.4.0 uutf.1.0.4+ox
          yojson.3.0.0 ocaml-variants&opium-testing ocaml ocaml-base-compiler
          ocaml-base-compiler base-domains ocaml-base-compiler
          oxcaml-angstrom-patches ocaml
- cmdliner -> cmdliner.1.3.0
    opium 0.20.0 requires < 2.0.0
- eqaf -> eqaf.0.9
    mirage-crypto 0.11.3 requires >= 0.8 & < 0.10
- mirage-crypto -> mirage-crypto.0.11.3
    opium 0.20.0 requires < 1.0.0
- 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
- opium-testing -> opium-testing.0.20.0
    User requested = 0.20.0
- oxcaml-angstrom-patches -> (problem)
    Rejected candidates:
      oxcaml-angstrom-patches.enabled: Requires angstrom = 0.16.1+ox
- oxcaml-compiler -> oxcaml-compiler.5.2.0minus39
    basement v0.18~preview.130.106+341 requires not(< 5.2.0minus39 | >= 5.4.0-ox1)

If you believe opium-testing.0.20.0 should be installable on Debian trixie, please comment on the ocurrent/ocaml-docs-ci issues: find issue · report issue