2022-03-17 12:46.03: New job: Build using linux-arm64 in
                                [https://github.com/mirage/mirage-skeleton.git#refs/heads/master (f1098f10fe215c072ff3fbfcb866fc0effeedc00)]

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#c5be829c58ab0c44a4bed85bc40d71961cccc56a"))
 (run (network host)
      (shell "opam repo add mirage-dev https://github.com/mirage/mirage-dev.git#e8f527bcf5eb2058a76f4faf4742810648db8f93"))
 (run (network host)
      (shell "opam pin -ny https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5"))
 (run (cache (download-cache (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam install -y \"mirage<4\""))
 (copy (src .) (dst /src/))
 (env MODE unix)
 (workdir /src/)
 (run (shell "opam exec -- make configure"))
 (env DUNE_CACHE enabled)
 (env DUNE_CACHE_TRANSPORT direct)
 (run (cache (download-cache (target /home/opam/.opam/download-cache)) (dune-build-cache (target /home/opam/.cache/dune)))
      (network host)
      (shell "opam exec -- make build"))
)

2022-03-17 12:46.03: Using cache hint "mirage-ci-skeleton-debian-10-ocaml-4.13"
2022-03-17 12:46.03: Waiting for resource in pool OCluster
2022-03-17 12:46.07: Waiting for worker...
2022-03-17 12:49.01: Got resource from pool OCluster
Building on arm64-jade-2.ocamllabs.io
All commits already cached
HEAD is now at f1098f1 require mirage 3.10.8

(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
72f0eb753e82: Pulling fs layer
8dfac77eb65d: Pulling fs layer
1aca41c53445: Pulling fs layer
72f0eb753e82: Verifying Checksum
72f0eb753e82: Download complete
1aca41c53445: Verifying Checksum
72f0eb753e82: Pull complete
8dfac77eb65d: Verifying Checksum
8dfac77eb65d: Download complete
8dfac77eb65d: Pull complete
1aca41c53445: Pull complete
Digest: sha256:3731414264777cd7cc32f48f6aa7530df7ecd142e5364d248df8462c7cab355a
Status: Downloaded newer image for ocaml/opam:debian-10-ocaml-4.13
2022-03-17 12:49.01 ---> using "cbba9511e46ef57631453d5b88aeed1ed6de6fa87b6f0dcb3da9328657d73fa4" from cache

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

/: (workdir /home/opam)

/home/opam: (run (shell "sudo chown opam:opam /home/opam"))
2022-03-17 12:49.01 ---> using "0afede13af6ea6d75cbfcfb80353059bc4fd4eea40a723ef627f0c4946f2e079" from cache

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.1 /usr/bin/opam && opam update"))
This development 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
2022-03-17 12:49.01 ---> using "88933084999984163bc104ca2978b0ba2b9c83ff33e4e30c3b6dae7cb5cde9bc" from cache

/home/opam: (run (network host)
                 (shell "opam repo add opam https://github.com/ocaml/opam-repository.git#c5be829c58ab0c44a4bed85bc40d71961cccc56a"))
[opam] Initialised
[NOTE] Repository opam has been added to the selections of switch 4.13 only.
       Run `opam repository add opam --all-switches|--set-default' to use it in all existing switches, or in newly created switches, respectively.

2022-03-17 12:49.01 ---> using "dd27a3c2f628e7f272b8cfe5165b85732037bfb320d288cbe362378954054329" from cache

/home/opam: (run (network host)
                 (shell "opam repo add mirage-dev https://github.com/mirage/mirage-dev.git#e8f527bcf5eb2058a76f4faf4742810648db8f93"))
[mirage-dev] Initialised
[NOTE] Repository mirage-dev has been added to the selections of switch 4.13 only.
       Run `opam repository add mirage-dev --all-switches|--set-default' to use it in all existing switches, or in newly created switches, respectively.

2022-03-17 12:49.06 ---> saved as "77e7262c99cd645514dbb8c71394fe54d9a2d23a4c21b3de8800b2743621ea6d"

/home/opam: (run (network host)
                 (shell "opam pin -ny https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5"))
This will pin the following packages: mirage-runtime, mirage-types-lwt, mirage-types, mirage. Continue? [Y/n] y
mirage-runtime is now pinned to git+https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5 (version 4.0.0~beta3)
mirage-types-lwt is now pinned to git+https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5 (version 3.10.8)
mirage-types is now pinned to git+https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5 (version 3.10.8)
mirage is now pinned to git+https://github.com/mirage/mirage.git#2f872b362bbdbd1cfe698d3a78d77b3823d119e5 (version 4.0.0~beta3)
2022-03-17 12:49.13 ---> saved as "45be257e55bebaa0268798664c6430c454b39517685aaba01243d3fdffa9c26a"

/home/opam: (run (cache (download-cache (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell "opam install -y \"mirage<4\""))

<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>
[mirage.4.0.0~beta3] synchronised (no changes)

[ERROR] mirage < 4 not available because the package is pinned to version 4.0.0~beta3
"/bin/bash" "-c" "opam install -y "mirage<4"" failed with exit status 5

2022-03-17 12:49.21: Job failed: Failed: Build failed