2024-04-10 17:28.00: New job: Build using linux-x86_64 in
                                [https://github.com/mirage/mirage-skeleton.git#refs/heads/main (4d09dfb1525be730ea77c98a7d28dd6002e2a2ba)]

OBuilder spec:

((from ocaml/opam:debian-10-ocaml-4.13)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo chown opam:opam /home/opam"))
 (run (shell "sudo ln -f /usr/bin/opam-2.1 /usr/bin/opam && opam update"))
 (run (network host)
      (shell "opam repo add opam https://github.com/ocaml/opam-repository.git#78f6cb00836476a1dee48b5f25431d211496ddbe"))
 (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 xen)
 (workdir /src/)
 (run (shell "opam exec -- make configure"))
 (env MIRAGE_EXTRA_REPOS opam-overlays:https://github.com/dune-universe/opam-overlays.git#4e75ee36715b27550d5bdb87686bb4ae4c9e89c4,mirage-opam-overlays:https://github.com/dune-universe/mirage-opam-overlays.git#797cb363df3ff763c43c8fbec5cd44de2878757e)
 (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"))
)

2024-04-10 17:28.00: Using cache hint "mirage-ci-skeleton-debian-10-ocaml-4.13"
2024-04-10 17:28.00: Connecting to build cluster…
2024-04-10 17:28.00: Waiting for resource in pool OCluster
2024-04-10 17:28.00: Waiting for worker…
2024-04-10 17:28.07: Got resource from pool OCluster
Building on x86-bm-c4.sw.ocaml.org
All commits already cached
HEAD is now at 4d09dfb Adapt to upstream changes

(from ocaml/opam:debian-10-ocaml-4.13)
Unable to find image 'ocaml/opam:debian-10-ocaml-4.13' locally
debian-10-ocaml-4.13: Pulling from ocaml/opam
e7d6ec2ac540: Pulling fs layer
e7d6ec2ac540: Verifying Checksum
e7d6ec2ac540: Download complete
e7d6ec2ac540: Pull complete
Digest: sha256:464e5319e1f1040ecb0a75ecac5dc6efa237cc29973b84238392e874e6c2d67a
Status: Downloaded newer image for ocaml/opam:debian-10-ocaml-4.13
2024-04-10 17:30.36 ---> saved as "cbba9511e46ef57631453d5b88aeed1ed6de6fa87b6f0dcb3da9328657d73fa4"

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo chown opam:opam /home/opam"))
2024-04-10 17:30.36 ---> saved as "54342da51d0603a14f6ba9989f4252ffa31f1ca13e80c1d45d63e53fc9e80646"

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.1 /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 2.1, 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] synchronised from file:///home/opam/opam-repository
2024-04-10 17:32.22 ---> saved as "3ddb42a6e856d7c2c5e614451b958647e474c5a4c98a94c3cc6a5e11dd914645"

/home/opam: (run (network host)
                 (shell "opam repo add opam https://github.com/ocaml/opam-repository.git#78f6cb00836476a1dee48b5f25431d211496ddbe"))
[opam] Initialised