(for PR #29312)

2026-01-30 20:43.28: New job: build mosaic.0.1.0, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29312/head (4219a994291bbd7606c64e62833ff523b0ca72c2)
                              on fedora-42-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29312/head" && git reset --hard 4219a994
git fetch origin master
git merge --no-edit 0758d335cb8d1367e501844fb86be0b07e4918ac
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:fedora-42-ocaml-5.4@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn mosaic.0.1.0 0.1.0
RUN opam reinstall mosaic.0.1.0; \
    res=$?; \
    test "$res" != 31 && exit "$res"; \
    export OPAMCLI=2.0; \
    build_dir=$(opam var prefix)/.opam-switch/build; \
    failed=$(ls "$build_dir"); \
    partial_fails=""; \
    for pkg in $failed; do \
    if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"fedora-42\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'mosaic.0.1.0' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1

END-OF-DOCKERFILE
docker build -f ../Dockerfile .

2026-01-30 20:43.28: Using cache hint "ocaml/opam:fedora-42-ocaml-5.4@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89-mosaic.0.1.0-4219a994291bbd7606c64e62833ff523b0ca72c2"
2026-01-30 20:43.28: Using OBuilder spec:
((from ocaml/opam:fedora-42-ocaml-5.4@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
 (run (network host)
      (shell "opam init --reinit --config .opamrc-sandbox -ni"))
 (run (shell "opam option solver=builtin-0install && opam config report"))
 (env OPAMDOWNLOADJOBS 1)
 (env OPAMERRLOGLEN 0)
 (env OPAMPRECISETRACKING 1)
 (env CI true)
 (env OPAM_REPO_CI true)
 (run (shell "rm -rf opam-repository/"))
 (copy (src .) (dst opam-repository/))
 (run (shell "opam repository set-url --strict default opam-repository/"))
 (run (network host)
      (shell "opam update --depexts || true"))
 (run (shell "opam pin add -k version -yn mosaic.0.1.0 0.1.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall mosaic.0.1.0;\
             \n        res=$?;\
             \n        test \"$res\" != 31 && exit \"$res\";\
             \n        export OPAMCLI=2.0;\
             \n        build_dir=$(opam var prefix)/.opam-switch/build;\
             \n        failed=$(ls \"$build_dir\");\
             \n        partial_fails=\"\";\
             \n        for pkg in $failed; do\
             \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"fedora-42\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'mosaic.0.1.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-01-30 20:43.28: Waiting for resource in pool OCluster
2026-01-30 20:58.24: Waiting for worker…
2026-01-30 21:00.33: Got resource from pool OCluster
Building on laodoke.caelum.ci.dev
All commits already cached
HEAD is now at 0758d335cb Merge pull request #29298 from raphael-proust/opam-publish-lwt_ppx.5.9.3
Updating 0758d335cb..4219a99429
Fast-forward
 packages/matrix/matrix.0.1.0/opam | 42 +++++++++++++++++++++++++++++++++++
 packages/mosaic/mosaic.0.1.0/opam | 46 +++++++++++++++++++++++++++++++++++++++
 packages/toffee/toffee.0.1.0/opam | 41 ++++++++++++++++++++++++++++++++++
 3 files changed, 129 insertions(+)
 create mode 100644 packages/matrix/matrix.0.1.0/opam
 create mode 100644 packages/mosaic/mosaic.0.1.0/opam
 create mode 100644 packages/toffee/toffee.0.1.0/opam

(from ocaml/opam:fedora-42-ocaml-5.4@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89)
Unable to find image 'ocaml/opam:fedora-42-ocaml-5.4@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89' locally
docker.io/ocaml/opam@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89: Pulling from ocaml/opam
9bf6f242b112: Pulling fs layer
8fabacba1251: Pulling fs layer
b556b825844b: Pulling fs layer
9e16b7647122: Pulling fs layer
12eaeb58df8c: Pulling fs layer
7838cf217961: Pulling fs layer
9e16b7647122: Waiting
12eaeb58df8c: Waiting
7838cf217961: Waiting
8fabacba1251: Verifying Checksum
8fabacba1251: Download complete
9e16b7647122: Verifying Checksum
9e16b7647122: Download complete
12eaeb58df8c: Download complete
7838cf217961: Verifying Checksum
7838cf217961: Download complete
b556b825844b: Verifying Checksum
b556b825844b: Download complete
9bf6f242b112: Verifying Checksum
9bf6f242b112: Download complete
9bf6f242b112: Pull complete
8fabacba1251: Pull complete
b556b825844b: Pull complete
9e16b7647122: Pull complete
12eaeb58df8c: Pull complete
7838cf217961: Pull complete
Digest: sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89
Status: Downloaded newer image for ocaml/opam@sha256:b74751ba6ac22a6f19a91dfb20696498aab52c04a5ce04357ab0a12279da8e89
2026-01-30 21:01.03 ---> using "8776fb0af6fc53898862b86f46ca8cee0489b257aca99b5899191e17bb0d5004" from cache

/: (user (uid 1000) (gid 1000))

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-01-30 21:01.03 ---> using "b8cca8bfd23834fb7e090e3c27f2170eb8281a065e79536f1e430ddc1b1c8118" from cache

/home/opam: (run (network host)
                 (shell "opam init --reinit --config .opamrc-sandbox -ni"))
Configuring from /home/opam/.opamrc-sandbox, then /home/opam/.opamrc, and finally from built-in defaults.
Checking for available remotes: rsync and local, git.
  - you won't be able to use mercurial repositories unless you install the hg command on your system.
  - you won't be able to use darcs repositories unless you install the darcs command on your system.

This version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted.
You may want to back it up before going further.

Continue? [Y/n] y
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-01-30 21:01.03 ---> using "3585d06f098553452479d6c335da00495554b93675451a57278a9271d623ff6d" from cache

/home/opam: (run (shell "opam option solver=builtin-0install && opam config report"))
Set to 'builtin-0install' the field solver in global configuration
# opam config report
# opam-version         2.5.0
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=fedora os-version=42
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 71
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       5.4
# invariant            ["ocaml-base-compiler" {>= "5.4.0"}]
# compiler-packages    ocaml-base-compiler.5.4.0, ocaml-compiler.5.4.0, ocaml-options-vanilla.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/5.4/lib/ocaml/stublibs:/home/opam/.opam/5.4/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       5.4.0
2026-01-30 21:01.03 ---> using "f5857c76864baf8cb3e699c519d757325cd57ff2fcd775d702006da4494b4c41" from cache

/home/opam: (env OPAMDOWNLOADJOBS 1)

/home/opam: (env OPAMERRLOGLEN 0)

/home/opam: (env OPAMPRECISETRACKING 1)

/home/opam: (env CI true)

/home/opam: (env OPAM_REPO_CI true)

/home/opam: (run (shell "rm -rf opam-repository/"))
2026-01-30 21:01.03 ---> using "b6df9f59c19836f991f70bcd0501fd40466d07d3a25be361fb57a3445396f9a6" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2026-01-30 21:01.21 ---> saved as "f4b10b2bd112881b4ee8c43b066eb5699a6da8d54aef90071f14616d384ef595"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-01-30 21:01.43 ---> saved as "9a4ac3fc44e5ae0b779bcf5e64580f8ed247d10b0e72c6193dd5dc10f1a84f5c"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/sbin/sudo "yum" "makecache"
- Updating and loading repositories:
-  Fedora 42 - x86_64 - Updates           100% |  27.8 KiB/s |  21.5 KiB |  00m01s
-  Fedora 42 - x86_64                     100% |  81.6 KiB/s |  23.4 KiB |  00m00s
-  Fedora 42 openh264 (From Cisco) - x86_ 100% |   6.9 KiB/s | 986.0   B |  00m00s
- Repositories loaded.
- Metadata cache created.
2026-01-30 21:01.50 ---> saved as "3341bb36e58659781cf54e6bf0dd49997b09cb6877c84ca94f460e8f219f085f"

/home/opam: (run (shell "opam pin add -k version -yn mosaic.0.1.0 0.1.0"))
mosaic is now pinned to version 0.1.0
2026-01-30 21:01.51 ---> saved as "501b61449651ba603de807d4f6f06376126ff36aef002d3c911d3278a915e493"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall mosaic.0.1.0;\
                        \n        res=$?;\
                        \n        test \"$res\" != 31 && exit \"$res\";\
                        \n        export OPAMCLI=2.0;\
                        \n        build_dir=$(opam var prefix)/.opam-switch/build;\
                        \n        failed=$(ls \"$build_dir\");\
                        \n        partial_fails=\"\";\
                        \n        for pkg in $failed; do\
                        \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"fedora-42\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'mosaic.0.1.0' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
mosaic.0.1.0 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 8 packages
  - install cmarkit    0.4.0          [required by mosaic]
  - install dune       3.21.0         [required by mosaic]
  - install matrix     0.1.0          [required by mosaic]
  - install mosaic     0.1.0 (pinned)
  - install ocamlbuild 0.16.1         [required by cmarkit]
  - install ocamlfind  1.9.8          [required by cmarkit]
  - install toffee     0.1.0          [required by mosaic]
  - install topkg      1.1.1          [required by cmarkit]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved cmarkit.0.4.0  (cached)
-> retrieved dune.3.21.0  (cached)
-> retrieved matrix.0.1.0, mosaic.0.1.0, toffee.0.1.0  (cached)
-> retrieved ocamlbuild.0.16.1  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved topkg.1.1.1  (cached)
-> installed ocamlfind.1.9.8
-> installed ocamlbuild.0.16.1
-> installed topkg.1.1.1
-> installed cmarkit.0.4.0
-> installed dune.3.21.0
-> installed toffee.0.1.0
[ERROR] The compilation of matrix.0.1.0 failed at "dune build -p matrix -j 71 @install".

#=== ERROR while compiling matrix.0.1.0 =======================================#
# context              2.5.0 | linux/x86_64 | ocaml-base-compiler.5.4.0 | file:///home/opam/opam-repository
# path                 ~/.opam/5.4/.opam-switch/build/matrix.0.1.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p matrix -j 71 @install
# exit-code            1
# env-file             ~/.opam/log/matrix-7-2b7100.env
# output-file          ~/.opam/log/matrix-7-2b7100.out
### output ###
# File "matrix/test/charts/dune", line 7, characters 7-17:
# 7 |   (pps ppx_expect)))
#            ^^^^^^^^^^
# Error: Library "ppx_expect" not found.
# -> required by library "test_charts" in _build/default/matrix/test/charts
# -> required by _build/default/META.matrix
# -> required by _build/install/default/lib/matrix/META
# -> required by _build/default/matrix.install
# -> required by alias install



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build matrix 0.1.0
+- 
+- The following changes have been performed (the rest was aborted)
| - install cmarkit    0.4.0
| - install dune       3.21.0
| - install ocamlbuild 0.16.1
| - install ocamlfind  1.9.8
| - install toffee     0.1.0
| - install topkg      1.1.1
+- 
# To update the current shell environment, run: eval $(opam env)

The former state can be restored with:
    /usr/bin/opam switch import "/home/opam/.opam/5.4/.opam-switch/backup/state-20260130210151.export"
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
[WARNING] OPAMCONFIRMLEVEL was ignored because CLI 2.0 was requested and it was introduced in 2.1.
opam-repo-ci detected dependencies failing:  matrix.0.1.0
"/usr/bin/env" "bash" "-c" "opam reinstall mosaic.0.1.0;
        res=$?;
        test "$res" != 31 && exit "$res";
        export OPAMCLI=2.0;
        build_dir=$(opam var prefix)/.opam-switch/build;
        failed=$(ls "$build_dir");
        partial_fails="";
        for pkg in $failed; do
          if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"fedora-42\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'mosaic.0.1.0' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 1
2026-01-30 21:03.06: Job failed: Failed: Build failed
2026-01-30 21:03.06: Log analysis:
2026-01-30 21:03.06: >>> 
[ERROR] The compilation of matrix.0.1.0 failed at "dune build -p matrix -j 71 @install".
 (score = 20)
2026-01-30 21:03.06: >>> 
# Error: Library "ppx_expect" not found.
 (score = 48)
2026-01-30 21:03.06: >>> 
opam-repo-ci detected dependencies failing:  matrix.0.1.0
 (score = 75)
2026-01-30 21:03.06:  matrix.0.1.0 failed to build