✗ 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: angstrom.0.16.1 arp.4.1.0 asn1-combinators.0.3.3 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 bos.0.3.0
          bstr.0.1.1 bytesrw.0.4.1 ca-certs-nss.3.129-1 cachet.0.0.4
          cachet-lwt.0.0.4 camlp-streams.5.0.1 carton.1.4.0 carton-lwt.1.4.0
          checkseum.0.5.4 cmdliner.2.1.1 conf-autoconf.1 conf-gmp.5
          conf-gmp-powm-sec.4 conf-pkg-config.5 conf-which.1 conf-zlib.1
          cppo.1.8.0 cryptokit.1.21.1 csexp.1.5.2 cstruct.6.3.0
          cstruct-lwt.6.3.0 csv.2.4 decompress.1.6.1 diffast-api.0.4
          diffast-cli.0.4 diffast-core.0.4 diffast-etc.0.4 diffast-git.0.4
          diffast-git-cli.0.4 diffast-langs-common.0.4 diffast-langs-cpp.0.4
          diffast-langs-cpp-parsing.0.4 diffast-langs-cpp-spec.0.4
          diffast-langs-fortran.0.4 diffast-langs-fortran-parsing.0.4
          diffast-langs-fortran-spec.0.4 diffast-langs-java.0.4
          diffast-langs-java-parsing.0.4 diffast-langs-java-spec.0.4
          diffast-langs-python.0.4 diffast-langs-python-parsing.0.4
          diffast-langs-python-spec.0.4 diffast-langs-verilog.0.4
          diffast-langs-verilog-parsing.0.4 diffast-langs-verilog-spec.0.4
          diffast-misc.0.4 digestif.1.3.1 dns.10.2.6 dns-client.10.2.6
          dns-client-mirage.10.2.6 domain-name.0.5.0 duff.0.5 dune.3.24.2
          dune-configurator.3.24.2 dune-private-libs.3.24.2 dune-site.3.24.2
          duration.0.3.1 dyn.3.24.2 emile.1.1 encore.0.8.1 eqaf.0.10
          ethernet.3.2.0 faraday.0.8.2 fmt.0.11.0 fpath.0.7.3 fs-io.3.24.2
          gen.1.1 git.3.18.0 git-mirage.3.18.0 git-paf.3.18.0 git-unix.3.18.0
          gmap.0.3.0 h2.0.13.0 happy-eyeballs.2.0.2 happy-eyeballs-lwt.2.0.2
          happy-eyeballs-mirage.2.0.2 hpack.0.13.0 httpun-types.0.2.0
          hxd.0.5.0 ipaddr.5.6.2 ipaddr-cstruct.5.6.2 kdf.1.1.2 ke.0.6
          logs.0.10.0 lru.0.3.1 lwt.6.1.2 lwt-dllist.1.1.0 macaddr.5.6.2
          macaddr-cstruct.5.6.2 markup.1.0.3 menhir.20260209
          menhirCST.20260209 menhirGLR.20260209 menhirLib.20260209
          menhirSdk.20260209 metrics.0.5.0 mimic.0.0.10
          mimic-happy-eyeballs.0.0.10 mirage-crypto.2.4.1
          mirage-crypto-ec.2.4.1 mirage-crypto-pk.2.4.1
          mirage-crypto-rng.2.4.1 mirage-flow.5.0.0 mirage-kv.6.1.1
          mirage-mtime.5.2.0 mirage-net.4.0.0 mirage-ptime.5.2.0
          mirage-sleep.4.1.0 mtime.2.2.0 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 ocamlgraph.2.2.0
          ocplib-endian.1.2 ohex.0.2.0 optint.0.3.0 ordering.3.24.2
          oxcaml.latest oxcaml-patch-guards.ox paf.0.8.0 pecu.0.7 pp.2.0.0
          ppx_derivers.1.2.1 ppxlib.0.39.0 psq.0.2.1 ptime.1.2.0
          randomconv.0.2.0 rresult.0.7.0 sedlex.3.8.1 seq.base
          sexp_type.v0.18~preview.130.106+341
          sexplib0.v0.18~preview.130.106+341 stdune.3.24.2 stringext.1.6.0
          tcpip.9.0.1 tls.2.1.3 tls-mirage.2.1.3 top-closure.3.24.2
          topkg.1.1.1+ox uchar.0.0.2 uri.4.4.0 uuidm.0.9.10 uutf.1.0.4+ox
          vlt.0.2.5 x509.1.2.0 zarith.1.14 ocaml-variants&diffast ocaml
          ocaml-base-compiler ocaml-base-compiler base-domains
          ocaml-base-compiler oxcaml-angstrom-patches ocaml
- awa -> awa.0.6.1
    awa-mirage 0.6.1 requires = 0.6.1
- awa-mirage -> awa-mirage.0.6.1
    git-mirage 3.18.0 requires >= 0.5.0 & < 0.7.0
- carton-git -> (problem)
    Rejected candidates:
      carton-git.0.7.2: Requires carton = 0.7.2
      carton-git.0.4.3: Requires carton = 0.4.3
      carton-git.0.2.0: Requires carton = 0.2.0
- diffast -> diffast.0.4
    User requested = 0.4
- h1 -> h1.1.0.0
    git-paf 3.18.0 requires < 1.1.0
- 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 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 diffast.0.4 should be installable on Debian trixie, please comment on the ocurrent/ocaml-docs-ci issues: find issue · report issue