(for PR #29579)

2026-03-21 18:37.01: New job: build conf-mingw-w64-zstd-x86_64.1, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29579/head (e26ca330660bcb49f8bb8e3d37703d278be8c4bd)
                              on debian-13-ocaml-4.10/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29579/head" && git reset --hard e26ca330
git fetch origin master
git merge --no-edit 76bf2ed9443fdee37e6f046c6295d358be3f8598
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-13-ocaml-4.10@sha256:568b0b812855432a8270123211f354430eb5bf2710c54bef2680b2509764a4ef
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn conf-mingw-w64-zstd-x86_64.1 1
RUN opam reinstall conf-mingw-w64-zstd-x86_64.1; \
    res=$?; \
    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 "$pkg" != 'conf-mingw-w64-zstd-x86_64.1' && partial_fails="$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 .

2026-03-21 18:37.01: Using cache hint "ocaml/opam:debian-13-ocaml-4.10@sha256:568b0b812855432a8270123211f354430eb5bf2710c54bef2680b2509764a4ef-conf-mingw-w64-zstd-x86_64.1-e26ca330660bcb49f8bb8e3d37703d278be8c4bd"
2026-03-21 18:37.01: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-4.10@sha256:568b0b812855432a8270123211f354430eb5bf2710c54bef2680b2509764a4ef)
 (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 conf-mingw-w64-zstd-x86_64.1 1"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall conf-mingw-w64-zstd-x86_64.1;\
             \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 \"$pkg\" != 'conf-mingw-w64-zstd-x86_64.1' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-03-21 18:37.01: Waiting for resource in pool OCluster
2026-03-21 18:37.05: Waiting for worker…
2026-03-21 18:37.05: Got resource from pool OCluster
Building on phoebe
All commits already cached
Updating files:  96% (17926/18509)
Updating files:  97% (17954/18509)
Updating files:  98% (18139/18509)
Updating files:  99% (18324/18509)
Updating files: 100% (18509/18509)
Updating files: 100% (18509/18509), done.
HEAD is now at 76bf2ed944 Merge pull request #29572 from hannesm/release-letsencrypt-v2.0.0
Updating 76bf2ed944..e26ca33066
Fast-forward
 packages/conf-findutils/conf-findutils.1/opam                       | 2 ++
 packages/conf-m4/conf-m4.1/opam                                     | 1 +
 .../conf-mingw-w64-bzip2-x86_64/conf-mingw-w64-bzip2-x86_64.1/opam  | 4 ++--
 packages/conf-mingw-w64-gcc-x86_64/conf-mingw-w64-gcc-x86_64.1/opam | 4 ++--
 packages/conf-mingw-w64-gmp-x86_64/conf-mingw-w64-gmp-x86_64.1/opam | 4 ++--
 .../conf-mingw-w64-pkgconf-x86_64.1/opam                            | 6 +++---
 .../conf-mingw-w64-zlib-x86_64/conf-mingw-w64-zlib-x86_64.1/opam    | 4 ++--
 .../conf-mingw-w64-zstd-x86_64/conf-mingw-w64-zstd-x86_64.1/opam    | 4 ++--
 packages/conf-perl/conf-perl.2/opam                                 | 1 +
 9 files changed, 17 insertions(+), 13 deletions(-)

(from ocaml/opam:debian-13-ocaml-4.10@sha256:568b0b812855432a8270123211f354430eb5bf2710c54bef2680b2509764a4ef)
2026-03-21 18:37.57 ---> saved as "a82dba32961c66fffb86953bb12cdd711004ffd74394bc571eefe8bc4451ff05"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-03-21 18:37.57 ---> saved as "cb65783f780ff2a87389d7ad63d3a137f1b9c1325de8cb78aad9183705303a9d"

/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.

Continue? [Y/n] y
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.

Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-03-21 18:38.24 ---> saved as "f3bb85c6855d9595a42e6d9ce3ae6929319d589bb6491c768abbc29b65ec9f77"

/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=debian os-version=13
# 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       4.10
# invariant            ["ocaml-base-compiler" {= "4.10.2"}]
# compiler-packages    ocaml-base-compiler.4.10.2
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.10/lib/ocaml/stublibs:/home/opam/.opam/4.10/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.10.2
2026-03-21 18:38.25 ---> saved as "760e6355903c886525328ff441c10020393d924f728574e32e6ead600317f9a3"

/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/"))
2026-03-21 18:38.36 ---> saved as "1a54bd38a90cb0e963e53ed1ad414b7ea3e37e57b226608d93790c8e0f3e9813"

/home/opam: (copy (src .) (dst opam-repository/))
2026-03-21 18:39.00 ---> saved as "a4cbb3b656f9ebe66e00ee2b22636e5988ec05eb9bbec2bf641d065330a8cf00"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-03-21 18:39.20 ---> saved as "81ad527fac108b128fa4bf2445fd52d14b3bf4270eac01f354306f77ab4a77b1"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Get:1 http://deb.debian.org/debian trixie InRelease [140 kB]
- 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 trixie/main amd64 Packages [9671 kB]
- Get:5 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [113 kB]
- Fetched 10.0 MB in 1s (7398 kB/s)
- Reading package lists...
- 
2026-03-21 18:39.23 ---> saved as "e80254efab13e021da0dcc449b4979ff24ca7e2185b7a76b13ad1657ba2918c8"

/home/opam: (run (shell "opam pin add -k version -yn conf-mingw-w64-zstd-x86_64.1 1"))
conf-mingw-w64-zstd-x86_64 is now pinned to version 1
2026-03-21 18:39.24 ---> saved as "f1aee5aca14a15b95477388e2eb38411f6c3423c4678f4411420b6c6e3728717"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall conf-mingw-w64-zstd-x86_64.1;\
                        \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 \"$pkg\" != 'conf-mingw-w64-zstd-x86_64.1' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
[ERROR] conf-mingw-w64-zstd-x86_64 = 1: unmet availability conditions: 'os = "win32"'
"/usr/bin/env" "bash" "-c" "opam reinstall conf-mingw-w64-zstd-x86_64.1;
        res=$?;
        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 "$pkg" != 'conf-mingw-w64-zstd-x86_64.1' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 5
2026-03-21 18:39.38: Job failed: Failed: Build failed
2026-03-21 18:39.38: Log analysis:
2026-03-21 18:39.38: >>> 
[ERROR] conf-mingw-w64-zstd-x86_64 = 1: unmet availability conditions: 'os = "win32"'
 (score = 100)
2026-03-21 18:39.38: [SKIP] Package not available