✗ 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: base.v0.18~preview.130.106+341 base-bigarray.base base-domains.base
          base-nnp.base base-threads.base base-unix.base
          base_internalhash_types.v0.18~preview.130.106+341
          basement.v0.18~preview.130.106+341
          capsule0.v0.18~preview.130.106+341 conf-autoconf.1 conf-which.1
          csexp.1.5.2 dune.3.24.2 dune-configurator.3.24.2 ezxmlm.1.1.0
          nonempty_list_type.v0.18~preview.130.106+341
          ocaml-compiler-libs.v0.17.0+ox ocaml-config.3
          ocaml-options-vanilla.1
          ocaml_intrinsics_kernel.v0.18~preview.130.106+341
          ocamlbuild.0.16.1+ox ocamlfind.1.9.8+ox oxcaml.latest
          oxcaml-patch-guards.ox ppx_array_base.v0.18~preview.130.106+341
          ppx_base.v0.18~preview.130.106+341
          ppx_compare.v0.18~preview.130.106+341 ppx_derivers.1.2.1
          ppx_enumerate.v0.18~preview.130.106+341
          ppx_globalize.v0.18~preview.130.106+341
          ppx_hash.v0.18~preview.130.106+341
          ppx_helpers.v0.18~preview.130.106+341 ppx_protocol_conv.5.2.3
          ppx_sexp_conv.v0.18~preview.130.106+341
          ppx_shorthand.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
          sexp_type.v0.18~preview.130.106+341
          sexplib0.v0.18~preview.130.106+341 stdlib-shims.0.3.0
          topkg.1.1.1+ox xmlm.1.4.0 ocaml-variants&ppx_protocol_conv_xmlm
          ocaml ocaml-base-compiler ocaml-base-compiler base-domains
          ocaml-base-compiler oxcaml-angstrom-patches ocaml
- 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
    base v0.18~preview.130.106+341 requires not(< 5.2.0minus39 | >= 5.4.0-ox1)
- ppx_protocol_conv_xmlm -> ppx_protocol_conv_xmlm.5.2.3
    User requested = 5.2.3
- ppxlib -> (problem)
    base v0.18~preview.130.106+341 requires >= 0.33.0 & < 0.36.0
    ppx_protocol_conv 5.2.3 requires >= 0.36.0
    Rejected candidates:
      ppxlib.0.39.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.38.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.37.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.36.2: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.36.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.35.0: Incompatible with restriction: >= 0.36.0
      ppxlib.0.34.0: Incompatible with restriction: >= 0.36.0
      ppxlib.0.33.0+ox2: Incompatible with restriction: >= 0.36.0
      ppxlib.0.33.0+ox1: Incompatible with restriction: >= 0.36.0
      ppxlib.0.33.0+ox: Incompatible with restriction: >= 0.36.0
      ppxlib.0.33.0: Incompatible with restriction: >= 0.36.0
      ppxlib.0.32.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.31.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.28.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.27.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.26.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.25.1: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.24.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.22.2: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.21.1: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.20.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.17.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.15.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.14.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.13.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0
      ppxlib.0.12.0: Incompatible with restriction: >= 0.33.0 & < 0.36.0

If you believe ppx_protocol_conv_xmlm.5.2.3 should be installable on Debian trixie, please comment on the ocurrent/ocaml-docs-ci issues: find issue · report issue