2026-05-08 12:09.21: New job: Build using linux-x86_64 in
                                [https://github.com/mirage/mirage-skeleton.git#refs/heads/dev (52abe5aedb1f19f6dd3a18dc9ad81c766f813ebc)]

OBuilder spec:

((from ocaml/opam:debian-13-ocaml-5.4)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo chown opam:opam /home/opam"))
 (run (shell "sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam && opam update"))
 (run (network host)
      (shell "opam repo add opam https://github.com/ocaml/opam-repository.git#fc08333d1ba03c1ffbc960479a92aa94085c5f78"))
 (run (network host)
      (shell "opam repo add mirage-dev https://github.com/mirage/mirage-dev.git#eb114ccf0dd4eeca6b4f06c5c7361c238eeca4fd"))
 (run (network host)
      (shell "opam pin -ny https://github.com/mirage/mirage.git#226ab4a44a8522120b4d7e5a875b08705c1857da"))
 (run (cache (download-cache (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "sudo apt-get update && opam install -y \"mirage>=4\""))
 (copy (src .) (dst /src/))
 (env MODE unix)
 (workdir /src/)
 (run (shell "opam exec -- make configure"))
 (env MIRAGE_EXTRA_REPOS opam-overlays:https://github.com/dune-universe/opam-overlays.git#12731a6f86d7c452a94c72106fa9d3327988582d,mirage-opam-overlays:https://github.com/dune-universe/mirage-opam-overlays.git#eddcd1bc7e035392596b603d23dde67a88e6f6bc)
 (run (network host)
      (shell "opam exec -- make lock"))
 (run (cache (download-cache (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "sudo apt-get update && opam exec -- make depends"))
 (run (shell "opam monorepo list -l mirage.opam.locked"))
 (run (cache (download-cache (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam exec -- make pull"))
 (env DUNE_CACHE enabled)
 (env DUNE_CACHE_TRANSPORT direct)
 (run (cache (dune-build-cache (target /home/opam/.cache/dune)))
      (network host)
      (shell "opam exec -- make build"))
)

2026-05-08 12:09.21: Using cache hint "mirage-ci-skeleton-debian-13-ocaml-5.4"
2026-05-08 12:09.21: Waiting for resource in pool OCluster
2026-05-08 12:09.22: Waiting for worker…
2026-05-08 12:09.23: Got resource from pool OCluster
Building on toxis.caelum.ci.dev
All commits already cached
HEAD is now at 52abe5a Merge pull request #421 from hannesm/mirage-411

(from ocaml/opam:debian-13-ocaml-5.4)
2026-05-08 12:09.34 ---> using "b7ac0c72667412e270cf200043933272f02ff07c0767d046333cbc683d48c937" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo chown opam:opam /home/opam"))
2026-05-08 12:09.34 ---> using "5641f8575878de47a5b29bcc887e4a17ca1be369a5de9aab9824cbbc69c489c1" from cache

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam && opam update"))
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 package repositories ><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-05-08 12:09.34 ---> using "5e7253eb62795a6b612b22c839bcc1fe2d9790109bdb83e3241177a8677fc595" from cache

/home/opam: (run (network host)
                 (shell "opam repo add opam https://github.com/ocaml/opam-repository.git#fc08333d1ba03c1ffbc960479a92aa94085c5f78"))
Uncaught exception: Unix.Unix_error(Unix.ENOENT, "open", "/var/cache/obuilder/in-progress/eef75681f928e9e8116b09f517bf1bfc83dd20e7bd06215f715a4d54bd382359/log")
2026-05-08 12:09.34: Job failed: Failed: Internal error