(not at the head of any monitored branch or PR)
2025-05-06 18:08.04: New job: build ocaml-unikraft-backend-firecracker.0.18.0, using opam 2.3
                              from https://github.com/ocaml/opam-repository.git#refs/pull/27856/head (232285450638d122b7441a6f42923184e4a1835b)
                              on debian-12-ocaml-4.08/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/27856/head" && git reset --hard 23228545
git fetch origin master
git merge --no-edit 8ae853b39e5c409b481d0d5d9318e0d8e6eee41d
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-12-ocaml-4.08@sha256:5bc01d13fd7fc0dd2eb054b90dadb4451e9b7ae39f017d3f6b43d3d37ef334b5
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn ocaml-unikraft-backend-firecracker.0.18.0 0.18.0
RUN opam reinstall ocaml-unikraft-backend-firecracker.0.18.0; \
    res=$?; \
    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 "\"debian-12\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'ocaml-unikraft-backend-firecracker.0.18.0' && partial_fails="$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 .

2025-05-06 18:08.04: Using cache hint "ocaml/opam:debian-12-ocaml-4.08@sha256:5bc01d13fd7fc0dd2eb054b90dadb4451e9b7ae39f017d3f6b43d3d37ef334b5-ocaml-unikraft-backend-firecracker.0.18.0-232285450638d122b7441a6f42923184e4a1835b"
2025-05-06 18:08.04: Using OBuilder spec:
((from ocaml/opam:debian-12-ocaml-4.08@sha256:5bc01d13fd7fc0dd2eb054b90dadb4451e9b7ae39f017d3f6b43d3d37ef334b5)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-2.3 /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 ocaml-unikraft-backend-firecracker.0.18.0 0.18.0"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall ocaml-unikraft-backend-firecracker.0.18.0;\
             \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 \"\\\"debian-12\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'ocaml-unikraft-backend-firecracker.0.18.0' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-05-06 18:08.04: Waiting for resource in pool OCluster
2025-05-06 18:08.08: Waiting for worker…
2025-05-06 18:08.08: Got resource from pool OCluster
Building on x86-bm-c2.sw.ocaml.org
HEAD is now at b6e971a2c4 FlexDLL 0.44
HEAD is now at 8ae853b39e Merge pull request #27847 from yallop/charset-0.2.0
Updating 8ae853b39e..2322854506
Fast-forward
 .../ocaml-unikraft-arm64.1.0.0/opam                | 40 +++++++++++++
 .../opam                                           | 68 ++++++++++++++++++++++
 .../opam                                           | 67 +++++++++++++++++++++
 .../ocaml-unikraft-backend-firecracker.0.18.0/opam | 18 ++++++
 .../ocaml-unikraft-backend-qemu-arm64.0.18.0/opam  | 68 ++++++++++++++++++++++
 .../ocaml-unikraft-backend-qemu-x86_64.0.18.0/opam | 67 +++++++++++++++++++++
 .../ocaml-unikraft-backend-qemu.0.18.0/opam        | 18 ++++++
 .../ocaml-unikraft-default-arm64.1.0.0/opam        | 24 ++++++++
 .../ocaml-unikraft-default-x86_64.1.0.0/opam       | 24 ++++++++
 .../ocaml-unikraft-option-debug.0.18.0/opam        | 11 ++++
 .../ocaml-unikraft-toolchain-arm64.0.18.0/opam     | 32 ++++++++++
 .../ocaml-unikraft-toolchain-x86_64.0.18.0/opam    | 32 ++++++++++
 .../ocaml-unikraft-x86_64.1.0.0/opam               | 40 +++++++++++++
 packages/ocaml-unikraft/ocaml-unikraft.1.0.0/opam  | 14 +++++
 packages/unikraft/unikraft.0.18.0/opam             | 40 +++++++++++++
 15 files changed, 563 insertions(+)
 create mode 100644 packages/ocaml-unikraft-arm64/ocaml-unikraft-arm64.1.0.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-firecracker-arm64/ocaml-unikraft-backend-firecracker-arm64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-firecracker-x86_64/ocaml-unikraft-backend-firecracker-x86_64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-firecracker/ocaml-unikraft-backend-firecracker.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-qemu-arm64/ocaml-unikraft-backend-qemu-arm64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-qemu-x86_64/ocaml-unikraft-backend-qemu-x86_64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-backend-qemu/ocaml-unikraft-backend-qemu.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-default-arm64/ocaml-unikraft-default-arm64.1.0.0/opam
 create mode 100644 packages/ocaml-unikraft-default-x86_64/ocaml-unikraft-default-x86_64.1.0.0/opam
 create mode 100644 packages/ocaml-unikraft-option-debug/ocaml-unikraft-option-debug.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-toolchain-arm64/ocaml-unikraft-toolchain-arm64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-toolchain-x86_64/ocaml-unikraft-toolchain-x86_64.0.18.0/opam
 create mode 100644 packages/ocaml-unikraft-x86_64/ocaml-unikraft-x86_64.1.0.0/opam
 create mode 100644 packages/ocaml-unikraft/ocaml-unikraft.1.0.0/opam
 create mode 100644 packages/unikraft/unikraft.0.18.0/opam

(from ocaml/opam:debian-12-ocaml-4.08@sha256:5bc01d13fd7fc0dd2eb054b90dadb4451e9b7ae39f017d3f6b43d3d37ef334b5)
2025-05-06 18:08.48 ---> saved as "70cf36b5e209218ae976b4f14dfd73e0beca93678d41d7eb8d665f21e3fc48fa"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam"))
2025-05-06 18:08.48 ---> saved as "00892ad38410b6735272f04ec092e099d0e360a6b4fa813b4e3ade7d0641bfdb"

/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 development 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
2025-05-06 18:09.29 ---> saved as "8761efa076a9357a033a1eefb0288007e6fc8421750f8051d7cad6dc171d77d5"

/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         2.3.0 (35acd0c5abc5e66cdbd5be16ba77aa6c33a4c724)
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=debian os-version=12
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 39
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       4.08
# invariant            ["ocaml-base-compiler" {= "4.08.1"}]
# compiler-packages    ocaml-base-compiler.4.08.1
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.08/lib/ocaml/stublibs:/home/opam/.opam/4.08/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.08.1
2025-05-06 18:09.30 ---> saved as "e23adf7fd5e12cbb06bc9742beb979cdd7557b76b8572c825248caa7402690cb"

/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/"))
2025-05-06 18:09.38 ---> saved as "ee3ec67416b7c95278927ab9f1fdd1d3b92dd537ceb1a636e9939c0d4f52c78c"

/home/opam: (copy (src .) (dst opam-repository/))
2025-05-06 18:09.47 ---> saved as "7be6be491c96213c928ea4e15f369e774e5f65e83de5eea92d520dc22ef2ea99"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-05-06 18:10.33 ---> saved as "4f30c105741b44d1a338c4c19eb70241f54eab290149532e82121206e728d580"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://deb.debian.org/debian bookworm InRelease
- Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
- Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
- Get:4 http://deb.debian.org/debian-security bookworm-security/main amd64 Packages [258 kB]
- Fetched 361 kB in 0s (1298 kB/s)
- Reading package lists...
2025-05-06 18:10.34 ---> saved as "1b8d0253372b1203b9291946637e106e85a46e3efdc6dd5474b1e54aba4a7789"

/home/opam: (run (shell "opam pin add -k version -yn ocaml-unikraft-backend-firecracker.0.18.0 0.18.0"))
ocaml-unikraft-backend-firecracker is now pinned to version 0.18.0
2025-05-06 18:10.35 ---> saved as "36910d2717a1bf70bff0dfb3537feb554dab73226ed48cc2047edcdc612722e1"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall ocaml-unikraft-backend-firecracker.0.18.0;\
                        \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 \"\\\"debian-12\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'ocaml-unikraft-backend-firecracker.0.18.0' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
ocaml-unikraft-backend-firecracker.0.18.0 is not installed. Install it? [y/n] y
  * Incompatible packages:
    - (invariant) -> ocaml-base-compiler = 4.08.1
    - ocaml-unikraft-backend-firecracker -> ocaml-unikraft-default-arm64 -> ocaml-unikraft-arm64 -> ocaml = 5.3.0 -> ocaml-variants >= 5.3.0~
    You can temporarily relax the switch invariant with `--update-invariant'

No solution found, exiting
"/usr/bin/env" "bash" "-c" "opam reinstall ocaml-unikraft-backend-firecracker.0.18.0;
        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 "\"debian-12\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'ocaml-unikraft-backend-firecracker.0.18.0' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 20
2025-05-06 18:10.50: Job failed: Failed: Build failed
2025-05-06 18:10.50: Log analysis:
2025-05-06 18:10.50: >>> 
No solution found, exiting
 (score = 100)
2025-05-06 18:10.50: [SKIP] Package not available