(for PR #27920)
2025-10-17 13:54.20: New job: build ocaml-fsrs.0.1.0-alpha3, using opam 2.0
                              from https://github.com/ocaml/opam-repository.git#refs/pull/27920/head (67423ee84b72a0a7e34b6e84fbb039f220f355cd)
                              on debian-13-ocaml-5.4/amd64
To reproduce locally:
cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27920/head" && git reset --hard 67423ee8
git fetch origin master
git merge --no-edit 5bf570252bd9fee71938b828ca0b86573c1e3355
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-5.4@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam depext -u || true
RUN opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3
RUN opam depext ocaml-fsrs.0.1.0-alpha3 && opam reinstall ocaml-fsrs.0.1.0-alpha3; \
    res=$?; \
    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 "\"debian-13\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1
END-OF-DOCKERFILE
docker build -f ../Dockerfile .
2025-10-17 13:54.20: Using cache hint "ocaml/opam:debian-13-ocaml-5.4@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8-ocaml-fsrs.0.1.0-alpha3-67423ee84b72a0a7e34b6e84fbb039f220f355cd"
2025-10-17 13:54.20: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam"))
 (run (network host)
      (shell "opam init --reinit --config .opamrc-sandbox -ni"))
 (run (shell "opam config report"))
 (env OPAMDOWNLOADJOBS 1)
 (env OPAMERRLOGLEN 0)
 (env OPAMPRECISETRACKING 1)
 (env CI true)
 (env OPAM_REPO_CI true)
 (run (shell "rm -rf opam-repository/"))
 (copy (src .) (dst opam-repository/))
 (run (shell "opam repository set-url --strict default opam-repository/"))
 (run (network host)
      (shell "opam depext -u || true"))
 (run (shell "opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam depext ocaml-fsrs.0.1.0-alpha3 && opam reinstall ocaml-fsrs.0.1.0-alpha3;\
             \n        res=$?;\
             \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 \"\\\"debian-13\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)
2025-10-17 13:54.20: Connecting to build cluster…
2025-10-17 13:54.20: Waiting for resource in pool OCluster
2025-10-17 14:19.26: Waiting for worker…
2025-10-17 14:26.42: Got resource from pool OCluster
Building on odawa.caelum.ci.dev
All commits already cached
HEAD is now at 5bf570252b Merge pull request #28700 from drjdn/opam-publish-p5scm.0.5.0
Merge made by the 'ort' strategy.
 packages/ocaml-fsrs/ocaml-fsrs.0.1.0-alpha3/opam | 41 ++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 packages/ocaml-fsrs/ocaml-fsrs.0.1.0-alpha3/opam
(from ocaml/opam:debian-13-ocaml-5.4@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8)
Unable to find image 'ocaml/opam:debian-13-ocaml-5.4@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8' locally
docker.io/ocaml/opam@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8: Pulling from ocaml/opam
Digest: sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8
Status: Downloaded newer image for ocaml/opam@sha256:219afd660465a4cdf35bbb1e4df7ffa6c984e8d79451af11e9939d6257f7c2b8
2025-10-17 14:33.35 ---> using "e779c3a4a56932d907bd71b1f7583592fd9370191ff90cc4f969b989cedfcba1" from cache
/: (user (uid 1000) (gid 1000))
/: (workdir /home/opam)
/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.0 /usr/bin/opam"))
2025-10-17 14:33.35 ---> using "3963c16a34ee0b68593e6ce80111e810d9744ae00e84893f060b266830cc5baf" from cache
/home/opam: (run (network host)
                 (shell "opam init --reinit --config .opamrc-sandbox -ni"))
[NOTE] Will configure 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.
[WARNING] Recommended dependencies -- most packages rely on these:
  - m4
<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
default (at git+file:///home/opam/opam-repository): 
    [INFO] opam 2.1 and 2.2 include many performance and security improvements over 2.0; please consider upgrading (https://opam.ocaml.org/doc/Install.html)
2025-10-17 14:33.35 ---> using "e82f93551a03492743cd5dce83a3535905314dc74b1c1baa37e815947ae9be28" from cache
/home/opam: (run (shell "opam config report"))
# opam config report
# opam-version      2.0.10 (adc1e1829a2bef5b240746df80341b508290fe3b) 
# self-upgrade      no
# system            arch=x86_64 os=linux os-distribution=debian os-version=13
# solver            builtin-mccs+glpk
# install-criteria  -removed,-count[version-lag,request],-count[version-lag,changed],-changed
# upgrade-criteria  -removed,-count[version-lag,solution],-new
# jobs              71
# repositories      1 (version-controlled)
# pinned            1 (version)
# current-switch    5.4
2025-10-17 14:33.35 ---> using "6751141926d40c90cc3f970c57a063e8afccca7689f8d050b89b99c5c06edf33" 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/"))
2025-10-17 14:33.35 ---> using "81c28077d454214a0f92e1c4d01192813efed38025a836b0ae56060a5d8dbc0d" from cache
/home/opam: (copy (src .) (dst opam-repository/))
2025-10-17 14:33.36 ---> using "2b8d6a4c273c067ebca2b21eda2a6d9c50985fe8363d5ff297ad20b50df5e70f" from cache
/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
default (at file:///home/opam/opam-repository): 
    [INFO] opam 2.1 and 2.2 include many performance and security improvements over 2.0; please consider upgrading (https://opam.ocaml.org/doc/Install.html)
2025-10-17 14:33.36 ---> using "f953cb611b34d28a54a2a470b40734845378accd2298e0a936bda363dfb31518" from cache
/home/opam: (run (network host)
                 (shell "opam depext -u || true"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
# No extra OS packages requirements found.
# All required OS packages found.
The following command needs to be run through "sudo":
    apt-get update
Hit:1 http://deb.debian.org/debian trixie InRelease
Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.3 kB]
Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB]
Get:4 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [56.5 kB]
Fetched 147 kB in 0s (2039 kB/s)
Reading package lists...
# OS package update successful
2025-10-17 14:33.36 ---> using "b3f98d7e2d4e97e59a3ae0c8aa532b53758cb2aac4001c2db8e0c0d32bbe32e0" from cache
/home/opam: (run (shell "opam pin add -k version -yn ocaml-fsrs.0.1.0-alpha3 0.1.0-alpha3"))
ocaml-fsrs is now pinned to version 0.1.0-alpha3
2025-10-17 14:33.36 ---> using "29be540a6137d13692d0e89feaf0512b22ba7b57068b4cefdaabe0dba973f408" from cache
/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam depext ocaml-fsrs.0.1.0-alpha3 && opam reinstall ocaml-fsrs.0.1.0-alpha3;\
                        \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 \"\\\"debian-13\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for ocaml-fsrs.0.1.0-alpha3: Your request can't be satisfied:
          - unmet availability conditions: opam-version >= "2.1.0"
Command failed: opam list --readonly --external '--resolve=ocaml-fsrs.0.1.0-alpha3' --color=never returned 20
"/usr/bin/env" "bash" "-c" "opam depext ocaml-fsrs.0.1.0-alpha3 && opam reinstall ocaml-fsrs.0.1.0-alpha3;
        res=$?;
        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 "\"debian-13\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'ocaml-fsrs.0.1.0-alpha3' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 20
2025-10-17 14:33.49: Job failed: Failed: Build failed
2025-10-17 14:33.49: Log analysis:
2025-10-17 14:33.49: >>> 
[ERROR] No solution for ocaml-fsrs.0.1.0-alpha3: Your request can't be satisfied:
 (score = 100)
2025-10-17 14:33.49: [SKIP] Package not available