Build:
  1. 0
2026-02-20 10:14.17: New job: test mhttp-server.0.0.1, using opam dev
                              from https://github.com/ocaml/opam-repository.git#refs/pull/29441/head (03a32901138b2da17acfb262503ab5e0755499b8)
                              on ubuntu-25.10-ocaml-5.4/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/29441/head" && git reset --hard 03a32901
git fetch origin master
git merge --no-edit d18d14011e4188f5c398421e2e99b297dd8150fb
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-dev /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn mhttp-server.0.0.1 0.0.1
RUN opam reinstall mhttp-server.0.0.1; \
    res=$?; \
    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 "\"ubuntu-25.10\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'mhttp-server.0.0.1' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1
RUN (opam reinstall --with-test mhttp-server.0.0.1) || true
RUN opam reinstall --with-test --verbose mhttp-server.0.0.1; \
    res=$?; \
    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 "\"ubuntu-25.10\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'mhttp-server.0.0.1' && partial_fails="$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 .

2026-02-20 10:14.17: Using cache hint "ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9-mhttp-server.0.0.1-03a32901138b2da17acfb262503ab5e0755499b8"
2026-02-20 10:14.17: Using OBuilder spec:
((from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9)
 (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 mhttp-server.0.0.1 0.0.1"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall mhttp-server.0.0.1;\
             \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 \"\\\"ubuntu-25.10\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'mhttp-server.0.0.1' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
 (run (network host)
      (shell "(opam reinstall --with-test mhttp-server.0.0.1) || true"))
 (run (shell  "opam reinstall --with-test --verbose mhttp-server.0.0.1;\
             \n        res=$?;\
             \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 \"\\\"ubuntu-25.10\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'mhttp-server.0.0.1' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2026-02-20 10:14.17: Waiting for resource in pool OCluster
2026-02-20 10:14.19: Waiting for worker…
2026-02-20 10:16.04: Got resource from pool OCluster
Building on doris.caelum.ci.dev
All commits already cached
Updating files:  91% (16741/18292)
Updating files:  92% (16829/18292)
Updating files:  93% (17012/18292)
Updating files:  94% (17195/18292)
Updating files:  95% (17378/18292)
Updating files:  96% (17561/18292)
Updating files:  97% (17744/18292)
Updating files:  98% (17927/18292)
Updating files:  99% (18110/18292)
Updating files: 100% (18292/18292)
Updating files: 100% (18292/18292), done.
HEAD is now at d18d14011e Merge pull request #29430 from hannesm/release-ipaddr-v5.6.2
Merge made by the 'ort' strategy.
 packages/mhttp-client/mhttp-client.0.0.1/opam | 30 +++++++++++++++++++++++++
 packages/mhttp-server/mhttp-server.0.0.1/opam | 30 +++++++++++++++++++++++++
 packages/mhttp/mhttp.0.0.1/opam               | 32 +++++++++++++++++++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 packages/mhttp-client/mhttp-client.0.0.1/opam
 create mode 100644 packages/mhttp-server/mhttp-server.0.0.1/opam
 create mode 100644 packages/mhttp/mhttp.0.0.1/opam

(from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9)
Unable to find image 'ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9' locally
docker.io/ocaml/opam@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9: Pulling from ocaml/opam
16c195d4c5e9: Already exists
10536c2a3229: Already exists
c4b489cde89f: Already exists
3054bf19173d: Already exists
72d4d5b175f6: Already exists
e2528088a671: Already exists
f8eb755e24f2: Already exists
f4466119d9d7: Already exists
ea16cb990595: Already exists
35a2f342fb41: Already exists
cd43ff613b85: Already exists
23c9e772d285: Already exists
03d461f90c5f: Already exists
1983245fed01: Already exists
bf5ceca7719f: Already exists
edcc8d3ba4ab: Already exists
ede0d4fa2b79: Already exists
c5b15849c9ed: Already exists
c5b15849c9ed: Already exists
62d63a36325d: Already exists
3eab5053bbaa: Already exists
ebd442105bf8: Already exists
b65dd44d0cc4: Already exists
4f4fb700ef54: Already exists
0b00030c2a7a: Already exists
3b032402c760: Already exists
5c73a2ae8046: Already exists
a512bd04e73a: Already exists
787d7ef97d34: Already exists
cc77994b0a28: Already exists
0b443ca6fb74: Already exists
301890f1dd56: Already exists
88a6e67e1c35: Already exists
775001f1433c: Already exists
aa095842f5b7: Already exists
afe7a0ab1c61: Already exists
28b53df2899a: Pulling fs layer
f85376da8e96: Pulling fs layer
40608bd1d2f9: Pulling fs layer
788d369129e6: Pulling fs layer
ef17a8aa60e0: Pulling fs layer
876754380d60: Pulling fs layer
2c4525547816: Pulling fs layer
471bab352bae: Pulling fs layer
9fed07c73e21: Pulling fs layer
4b266238f0af: Pulling fs layer
9d0e5721665f: Pulling fs layer
d8ebc1ce374e: Pulling fs layer
2fe64b0faeff: Pulling fs layer
788d369129e6: Waiting
ef17a8aa60e0: Waiting
876754380d60: Waiting
2c4525547816: Waiting
471bab352bae: Waiting
9fed07c73e21: Waiting
9d0e5721665f: Waiting
4b266238f0af: Waiting
d8ebc1ce374e: Waiting
f85376da8e96: Download complete
788d369129e6: Verifying Checksum
788d369129e6: Download complete
ef17a8aa60e0: Verifying Checksum
ef17a8aa60e0: Download complete
876754380d60: Verifying Checksum
876754380d60: Download complete
28b53df2899a: Verifying Checksum
28b53df2899a: Download complete
2c4525547816: Verifying Checksum
2c4525547816: Download complete
471bab352bae: Verifying Checksum
471bab352bae: Download complete
9fed07c73e21: Verifying Checksum
9fed07c73e21: Download complete
9d0e5721665f: Verifying Checksum
9d0e5721665f: Download complete
d8ebc1ce374e: Verifying Checksum
d8ebc1ce374e: Download complete
2fe64b0faeff: Verifying Checksum
2fe64b0faeff: Download complete
4b266238f0af: Verifying Checksum
4b266238f0af: Download complete
40608bd1d2f9: Verifying Checksum
40608bd1d2f9: Download complete
28b53df2899a: Pull complete
f85376da8e96: Pull complete
40608bd1d2f9: Pull complete
788d369129e6: Pull complete
ef17a8aa60e0: Pull complete
876754380d60: Pull complete
2c4525547816: Pull complete
471bab352bae: Pull complete
9fed07c73e21: Pull complete
4b266238f0af: Pull complete
9d0e5721665f: Pull complete
d8ebc1ce374e: Pull complete
2fe64b0faeff: Pull complete
Digest: sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9
Status: Downloaded newer image for ocaml/opam@sha256:5054050bcc19d88ec491f2aad9c7ccdb8a18208c8da34cc2ce253d8c28bd72b9
2026-02-20 10:16.36 ---> using "57cf0cbd31d78ac2c1a1f7b3c1a2f72692b0a142c39355b96b6f72e2922dbc32" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-dev /usr/bin/opam"))
2026-02-20 10:16.36 ---> using "9232b665f20d18b709c3cb4a4618e8bcd34d78eb3223e7e510d6aa683ee84070" 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
2026-02-20 10:16.36 ---> using "f72483b12f79065d016a18eb744f3398a6d0ea933b33a8376f4a61bdec0c1bf8" 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=ubuntu os-version=25.10
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 255
# 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
2026-02-20 10:16.36 ---> using "326ef1a7baf3ee05eac63971a8c4f83732ea05062fc2dc48448fee42095e7aa4" 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/"))
2026-02-20 10:16.36 ---> using "5ebbe41a73da3413fd468a065ad0b07690e686e091aad08ae010bf6d686cb452" from cache

/home/opam: (copy (src .) (dst opam-repository/))
2026-02-20 10:17.15 ---> saved as "39f05d3cec83d7db85ed79e0ad81dd0849484c4d6088668540b95b36514306dc"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2026-02-20 10:17.37 ---> saved as "e6041816309bbd90bff4779d1a6fc812b5f63b61814b57a1f4cd0e436ea4b1c2"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://archive.ubuntu.com/ubuntu questing InRelease
- Get:2 http://archive.ubuntu.com/ubuntu questing-updates InRelease [136 kB]
- Get:3 http://archive.ubuntu.com/ubuntu questing-backports InRelease [133 kB]
- Get:4 http://archive.ubuntu.com/ubuntu questing-updates/restricted amd64 Packages [204 kB]
- Get:5 http://archive.ubuntu.com/ubuntu questing-updates/universe amd64 Packages [250 kB]
- Get:6 http://archive.ubuntu.com/ubuntu questing-updates/main amd64 Packages [393 kB]
- Get:7 http://security.ubuntu.com/ubuntu questing-security InRelease [136 kB]
- Get:8 http://security.ubuntu.com/ubuntu questing-security/universe amd64 Packages [147 kB]
- Get:9 http://security.ubuntu.com/ubuntu questing-security/main amd64 Packages [242 kB]
- Get:10 http://security.ubuntu.com/ubuntu questing-security/restricted amd64 Packages [194 kB]
- Fetched 1835 kB in 1s (2833 kB/s)
- Reading package lists...
- 
2026-02-20 10:17.39 ---> saved as "b4a23fe10e449ec94fb7bbbae12d42140675892c398ccc063e64b3fe49dbc21a"

/home/opam: (run (shell "opam pin add -k version -yn mhttp-server.0.0.1 0.0.1"))
mhttp-server is now pinned to version 0.0.1
2026-02-20 10:17.39 ---> saved as "f211f40dba2bba7c2927d3803b22af9f18b963a631a95f6511012e9588d11e2c"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall mhttp-server.0.0.1;\
                        \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 \"\\\"ubuntu-25.10\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'mhttp-server.0.0.1' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
mhttp-server.0.0.1 is not installed. Install it? [Y/n] y
The following actions will be performed:
=== install 92 packages
  - install angstrom                 0.16.1         [required by h1, h2]
  - install arp                      4.1.0          [required by tcpip]
  - install asn1-combinators         0.3.2          [required by x509]
  - install astring                  0.8.5          [required by bos]
  - install base-bytes               base           [required by ocplib-endian]
  - install base64                   3.5.2          [required by h2, h1, utcp]
  - install bigstringaf              0.10.0         [required by h2]
  - install bin                      0.0.4          [required by mnet]
  - install bos                      0.2.1          [required by ca-certs]
  - install bstr                     0.0.4          [required by httpcats, mnet]
  - install bytesrw                  0.3.0          [required by mkernel]
  - install ca-certs                 1.0.1          [required by httpcats]
  - install cmdliner                 2.1.0          [required by hxd]
  - install conf-gmp                 5              [required by conf-gmp-powm-sec, zarith]
  - install conf-gmp-powm-sec        4              [required by mirage-crypto-pk]
  - install conf-libseccomp          1              [required by solo5]
  - install conf-pkg-config          4              [required by bytesrw]
  - install cppo                     1.8.0          [required by lwt]
  - install csexp                    1.5.2          [required by dune-configurator]
  - install cstruct                  6.2.0          [required by utcp]
  - install cstruct-lwt              6.2.0          [required by tcpip]
  - install digestif                 1.3.0          [required by ca-certs]
  - install dns                      10.2.3         [required by dns-client]
  - install dns-client               10.2.3         [required by dns-client-miou-unix]
  - install dns-client-miou-unix     10.2.3         [required by httpcats]
  - install domain-name              0.5.0          [required by dns-client-miou-unix]
  - install dune                     3.21.1         [required by mhttp-server]
  - install dune-configurator        3.21.1         [required by hxd]
  - install duration                 0.2.1          [required by mnet]
  - install eqaf                     0.10           [required by digestif, mirage-crypto]
  - install ethernet                 3.2.0          [required by tcpip]
  - install faraday                  0.8.2          [required by h1, h2]
  - install fmt                      0.11.0         [required by mnet]
  - install fpath                    0.7.3          [required by ca-certs]
  - install gmap                     0.3.0          [required by x509]
  - install h1                       1.1.0          [required by httpcats]
  - install h2                       0.13.0         [required by httpcats]
  - install happy-eyeballs           2.0.1          [required by mnet]
  - install happy-eyeballs-miou-unix 2.0.1          [required by httpcats]
  - install hpack                    0.13.0         [required by h2]
  - install httpcats                 0.2.0          [required by mhttp]
  - install httpun-types             0.2.0          [required by h1, h2]
  - install hxd                      0.4.0          [required by mnet]
  - install ipaddr                   5.6.2          [required by mnet]
  - install ipaddr-cstruct           5.6.2          [required by utcp]
  - install jsont                    0.2.0          [required by mkernel]
  - install kdf                      1.0.0          [required by x509]
  - install logs                     0.10.0         [required by mkernel, ca-certs, utcp]
  - install lru                      0.3.1          [required by tcpip]
  - install lwt                      6.1.0          [required by hxd, utcp]
  - install lwt-dllist               1.1.0          [required by tcpip]
  - install macaddr                  5.6.2          [required by mnet]
  - install macaddr-cstruct          5.6.2          [required by tcpip]
  - install metrics                  0.5.0          [required by utcp]
  - install mhttp                    0.0.1          [required by mhttp-server]
  - install mhttp-server             0.0.1 (pinned)
  - install miou                     0.5.4          [required by httpcats]
  - install mirage-crypto            2.0.3          [required by ca-certs]
  - install mirage-crypto-ec         2.0.3          [required by x509]
  - install mirage-crypto-pk         2.0.3          [required by x509]
  - install mirage-crypto-rng        2.0.3          [required by mhttp]
  - install mirage-flow              5.0.0          [required by tcpip]
  - install mirage-mtime             5.2.0          [required by utcp]
  - install mirage-net               4.0.0          [required by tcpip]
  - install mirage-sleep             4.1.0          [required by utcp]
  - install mkernel                  0.0.1          [required by mnet]
  - install mnet                     0.0.1          [required by mhttp]
  - install mnet-tls                 0.0.1          [required by mhttp-server]
  - install mtime                    2.1.0          [required by utcp]
  - install ocaml-solo5              1.2.0          [required by mkernel]
  - install ocaml-src                5.4.0          [required by ocaml-solo5]
  - install ocaml-syntax-shims       1.0.0          [required by angstrom]
  - install ocamlbuild               0.16.1         [required by bytesrw, bos, ptime, jsont]
  - install ocamlfind                1.9.8          [required by jsont, ptime, bos, etc.]
  - install ocplib-endian            1.2            [required by lwt]
  - install ohex                     0.2.0          [required by ca-certs]
  - install opatch                   3.1.0          [required by ocaml-solo5]
  - install patch                    3.1.0          [required by opatch]
  - install psq                      0.2.1          [required by h2]
  - install ptime                    1.2.0          [required by ca-certs]
  - install randomconv               0.2.0          [required by utcp]
  - install rresult                  0.7.0          [required by bos]
  - install seq                      base           [required by psq]
  - install slice                    0.0.4          [required by mnet]
  - install solo5                    0.10.0         [required by mkernel]
  - install tcpip                    9.0.1          [required by utcp]
  - install tls                      2.0.3          [required by mnet, mnet-tls]
  - install tls-miou-unix            2.0.3          [required by httpcats]
  - install topkg                    1.1.1          [required by bytesrw, bos, ptime, jsont]
  - install utcp                     0.0.2          [required by mnet, mnet-tls]
  - install x509                     1.0.6          [required by ca-certs]
  - install zarith                   1.14           [required by mirage-crypto-pk]

The following system packages will first need to be installed:
    libgmp-dev libseccomp-dev pkg-config

<><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><>

opam believes some required external dependencies are missing. opam can:
> 1. Run apt-get to install them (may need root/sudo access)
  2. Display the recommended apt-get command and wait while you run it manually (e.g. in another terminal)
  3. Continue anyway, and, upon success, permanently register that this external dependency is present, but not detectable
  4. Abort the installation

[1/2/3/4] 1

+ /usr/bin/sudo "apt-get" "install" "-qq" "-yy" "libgmp-dev" "libseccomp-dev" "pkg-config"
- Selecting previously unselected package libgmpxx4ldbl:amd64.
- (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 18742 files and directories currently installed.)
- Preparing to unpack .../0-libgmpxx4ldbl_2%3a6.3.0+dfsg-5ubuntu1_amd64.deb ...
- Unpacking libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-5ubuntu1) ...
- Selecting previously unselected package libgmp-dev:amd64.
- Preparing to unpack .../1-libgmp-dev_2%3a6.3.0+dfsg-5ubuntu1_amd64.deb ...
- Unpacking libgmp-dev:amd64 (2:6.3.0+dfsg-5ubuntu1) ...
- Selecting previously unselected package libpkgconf3:amd64.
- Preparing to unpack .../2-libpkgconf3_1.8.1-4build1_amd64.deb ...
- Unpacking libpkgconf3:amd64 (1.8.1-4build1) ...
- Selecting previously unselected package libseccomp-dev:amd64.
- Preparing to unpack .../3-libseccomp-dev_2.6.0-2ubuntu2_amd64.deb ...
- Unpacking libseccomp-dev:amd64 (2.6.0-2ubuntu2) ...
- Selecting previously unselected package pkgconf-bin.
- Preparing to unpack .../4-pkgconf-bin_1.8.1-4build1_amd64.deb ...
- Unpacking pkgconf-bin (1.8.1-4build1) ...
- Selecting previously unselected package pkgconf:amd64.
- Preparing to unpack .../5-pkgconf_1.8.1-4build1_amd64.deb ...
- Unpacking pkgconf:amd64 (1.8.1-4build1) ...
- Selecting previously unselected package pkg-config:amd64.
- Preparing to unpack .../6-pkg-config_1.8.1-4build1_amd64.deb ...
- Unpacking pkg-config:amd64 (1.8.1-4build1) ...
- Setting up libseccomp-dev:amd64 (2.6.0-2ubuntu2) ...
- Setting up libpkgconf3:amd64 (1.8.1-4build1) ...
- Setting up libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-5ubuntu1) ...
- Setting up pkgconf-bin (1.8.1-4build1) ...
- Setting up libgmp-dev:amd64 (2:6.3.0+dfsg-5ubuntu1) ...
- Setting up pkgconf:amd64 (1.8.1-4build1) ...
- Setting up pkg-config:amd64 (1.8.1-4build1) ...
- Processing triggers for libc-bin (2.42-0ubuntu3.1) ...

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved angstrom.0.16.1  (cached)
-> retrieved arp.4.1.0  (cached)
-> retrieved asn1-combinators.0.3.2  (cached)
-> retrieved astring.0.8.5  (cached)
-> retrieved base64.3.5.2  (cached)
-> retrieved bigstringaf.0.10.0  (cached)
-> retrieved bin.0.0.4, bstr.0.0.4, slice.0.0.4  (cached)
-> retrieved bos.0.2.1  (cached)
-> retrieved bytesrw.0.3.0  (cached)
-> retrieved ca-certs.1.0.1  (cached)
-> retrieved cmdliner.2.1.0  (cached)
-> retrieved conf-gmp.5  (cached)
-> retrieved conf-gmp-powm-sec.4  (cached)
-> retrieved cppo.1.8.0  (cached)
-> retrieved csexp.1.5.2  (cached)
-> installed conf-gmp.5
-> retrieved cstruct.6.2.0, cstruct-lwt.6.2.0  (cached)
-> installed conf-pkg-config.4
-> installed conf-gmp-powm-sec.4
-> installed conf-libseccomp.1
-> retrieved digestif.1.3.0  (cached)
-> retrieved dns.10.2.3, dns-client.10.2.3, dns-client-miou-unix.10.2.3  (cached)
-> retrieved domain-name.0.5.0  (cached)
-> retrieved dune.3.21.1, dune-configurator.3.21.1  (cached)
-> retrieved duration.0.2.1  (cached)
-> retrieved eqaf.0.10  (cached)
-> retrieved ethernet.3.2.0  (cached)
-> retrieved faraday.0.8.2  (cached)
-> retrieved fmt.0.11.0  (cached)
-> retrieved fpath.0.7.3  (cached)
-> retrieved gmap.0.3.0  (cached)
-> retrieved h1.1.1.0  (cached)
-> retrieved h2.0.13.0, hpack.0.13.0  (cached)
-> installed cmdliner.2.1.0
-> retrieved happy-eyeballs.2.0.1, happy-eyeballs-miou-unix.2.0.1  (cached)
-> retrieved httpcats.0.2.0  (cached)
-> retrieved httpun-types.0.2.0  (cached)
-> retrieved hxd.0.4.0  (cached)
-> retrieved ipaddr.5.6.2, ipaddr-cstruct.5.6.2, macaddr.5.6.2, macaddr-cstruct.5.6.2  (cached)
-> retrieved jsont.0.2.0  (cached)
-> retrieved kdf.1.0.0  (cached)
-> retrieved logs.0.10.0  (cached)
-> retrieved lru.0.3.1  (cached)
-> retrieved lwt.6.1.0  (cached)
-> retrieved lwt-dllist.1.1.0  (cached)
-> retrieved metrics.0.5.0  (cached)
-> retrieved mhttp.0.0.1, mhttp-server.0.0.1  (cached)
-> retrieved miou.0.5.4  (cached)
-> retrieved mirage-crypto.2.0.3, mirage-crypto-ec.2.0.3, mirage-crypto-pk.2.0.3, mirage-crypto-rng.2.0.3  (cached)
-> retrieved mirage-flow.5.0.0  (cached)
-> retrieved mirage-mtime.5.2.0  (cached)
-> retrieved mirage-net.4.0.0  (cached)
-> retrieved mirage-sleep.4.1.0  (cached)
-> retrieved mkernel.0.0.1  (cached)
-> retrieved mnet.0.0.1, mnet-tls.0.0.1  (cached)
-> retrieved mtime.2.1.0  (cached)
-> retrieved ocaml-solo5.1.2.0  (cached)
-> retrieved ocaml-src.5.4.0  (cached)
-> retrieved ocaml-syntax-shims.1.0.0  (cached)
-> retrieved ocamlbuild.0.16.1  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved ocplib-endian.1.2  (cached)
-> retrieved ohex.0.2.0  (cached)
-> retrieved opatch.3.1.0, patch.3.1.0  (cached)
-> retrieved psq.0.2.1  (cached)
-> retrieved ptime.1.2.0  (cached)
-> retrieved randomconv.0.2.0  (cached)
-> retrieved rresult.0.7.0  (cached)
-> retrieved seq.base  (cached)
-> retrieved solo5.0.10.0  (cached)
-> installed ocaml-src.5.4.0
-> installed seq.base
-> retrieved tcpip.9.0.1  (cached)
-> retrieved tls.2.0.3, tls-miou-unix.2.0.3  (cached)
-> retrieved topkg.1.1.1  (cached)
-> retrieved utcp.0.0.2  (cached)
-> retrieved x509.1.0.6  (cached)
-> retrieved zarith.1.14  (cached)
-> installed ocamlfind.1.9.8
-> installed base-bytes.base
-> installed ocamlbuild.0.16.1
-> installed zarith.1.14
-> installed topkg.1.1.1
-> installed rresult.0.7.0
-> installed mtime.2.1.0
-> installed fmt.0.11.0
-> installed ptime.1.2.0
-> installed astring.0.8.5
-> installed bytesrw.0.3.0
-> installed fpath.0.7.3
-> installed solo5.0.10.0
-> installed dune.3.21.1
-> installed jsont.0.2.0
-> installed base64.3.5.2
-> installed bstr.0.0.4
-> installed duration.0.2.1
-> installed csexp.1.5.2
-> installed asn1-combinators.0.3.2
-> installed cppo.1.8.0
-> installed cstruct.6.2.0
-> installed domain-name.0.5.0
-> installed eqaf.0.10
-> installed gmap.0.3.0
-> installed lwt-dllist.1.1.0
-> installed macaddr.5.6.2
-> installed metrics.0.5.0
-> installed mirage-mtime.5.2.0
-> installed ocaml-syntax-shims.1.0.0
-> installed ohex.0.2.0
-> installed patch.3.1.0
-> installed psq.0.2.1
-> installed randomconv.0.2.0
-> installed slice.0.0.4
-> installed macaddr-cstruct.5.6.2
-> installed ocplib-endian.1.2
-> installed lru.0.3.1
-> installed ipaddr.5.6.2
-> installed bin.0.0.4
-> installed opatch.3.1.0
-> installed digestif.1.3.0
-> installed ipaddr-cstruct.5.6.2
-> installed dune-configurator.3.21.1
-> installed bigstringaf.0.10.0
-> installed faraday.0.8.2
-> installed angstrom.0.16.1
-> installed httpun-types.0.2.0
-> installed miou.0.5.4
-> installed hpack.0.13.0
-> installed mirage-crypto.2.0.3
-> installed h1.1.1.0
-> installed kdf.1.0.0
-> installed h2.0.13.0
-> installed lwt.6.1.0
-> installed cstruct-lwt.6.2.0
-> installed mirage-flow.5.0.0
-> installed mirage-net.4.0.0
-> installed mirage-sleep.4.1.0
-> installed hxd.0.4.0
-> installed logs.0.10.0
-> installed ethernet.3.2.0
-> installed happy-eyeballs.2.0.1
-> installed mirage-crypto-rng.2.0.3
-> installed arp.4.1.0
-> installed happy-eyeballs-miou-unix.2.0.1
-> installed mirage-crypto-pk.2.0.3
-> installed dns.10.2.3
-> installed tcpip.9.0.1
-> installed dns-client.10.2.3
-> installed bos.0.2.1
-> installed utcp.0.0.2
-> installed mirage-crypto-ec.2.0.3
-> installed x509.1.0.6
-> installed ca-certs.1.0.1
-> installed tls.2.0.3
-> installed tls-miou-unix.2.0.3
-> installed dns-client-miou-unix.10.2.3
-> installed httpcats.0.2.0
-> installed ocaml-solo5.1.2.0
-> installed mkernel.0.0.1
-> installed mnet.0.0.1
-> installed mnet-tls.0.0.1
-> installed mhttp.0.0.1
-> installed mhttp-server.0.0.1
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-20 10:19.39 ---> saved as "f1f08016b8bceacccd41deb56ce9356d0ab536958863c8c5cde64496a4e3e30e"

/home/opam: (run (network host)
                 (shell "(opam reinstall --with-test mhttp-server.0.0.1) || true"))
The following actions will be performed:
=== recompile 1 package
  - recompile mhttp-server 0.0.1 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> removed   mhttp-server.0.0.1
-> installed mhttp-server.0.0.1
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-20 10:19.43 ---> saved as "37b2428281021a33aa496e639e5680eea70f247de4b075ab2bb7e3d4b323680c"

/home/opam: (run (shell  "opam reinstall --with-test --verbose mhttp-server.0.0.1;\
                        \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 \"\\\"ubuntu-25.10\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'mhttp-server.0.0.1' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
The following actions will be performed:
=== recompile 1 package
  - recompile mhttp-server 0.0.1 (pinned)

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Processing  2/4: [mhttp-server: dune build]
+ /home/opam/.opam/opam-init/hooks/sandbox.sh "build" "dune" "build" "-p" "mhttp-server" "-j" "255" (CWD=/home/opam/.opam/5.4/.opam-switch/build/mhttp-server.0.0.1)
Processing  2/4: [mhttp-server: dune runtest]
+ /home/opam/.opam/opam-init/hooks/sandbox.sh "build" "dune" "runtest" "-p" "mhttp-server" "-j" "255" (CWD=/home/opam/.opam/5.4/.opam-switch/build/mhttp-server.0.0.1)
-> compiled  mhttp-server.0.0.1
-> removed   mhttp-server.0.0.1
-> installed mhttp-server.0.0.1
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-20 10:19.47 ---> saved as "79484f9d0b182569b8b3fb1a0a3c7f8f7e7a486bd8c7ca9488227c1af8f79bd7"
Job succeeded
2026-02-20 10:20.15: Job succeeded