2026-03-16 10:25.05: New job: Build using linux-x86_64 in
                                []
2026-03-16 10:25.05: Will push staging image to ocurrent/opam-staging:debian-12-ocaml-5.3-amd64

Dockerfile:

# syntax=docker/dockerfile:1

FROM ocurrent/opam-staging@sha256:de1c0887231de0c25a6d8c01388aac86326aef5f70c6d095908faf70007b143d
ENV OPAMYES="1" OPAMCONFIRMLEVEL="unsafe-yes" OPAMERRLOGLEN="0" OPAMPRECISETRACKING="1"
USER root
RUN apt-get -y update
RUN DEBIAN_FRONTEND=noninteractive apt-get -y upgrade
RUN DEBIAN_FRONTEND=noninteractive apt-get -y install libzstd-dev
USER opam
RUN opam switch create 5.3 --packages=ocaml-base-compiler.5.3.0
RUN opam pin add -k version ocaml-base-compiler 5.3.0
RUN opam install -y opam-depext
ENTRYPOINT [ "opam", "exec", "--" ]
CMD bash
COPY --link [ "Dockerfile", "/Dockerfile.ocaml" ]


2026-03-16 10:25.05: Using cache hint "5.3.0-amd64-ocurrent/opam-staging@sha256:de1c0887231de0c25a6d8c01388aac86326aef5f70c6d095908faf70007b143d"
2026-03-16 10:25.05: Waiting for resource in pool OCluster
2026-03-16 10:25.05: Waiting for worker…
2026-03-16 10:25.05: Got resource from pool OCluster
Building on eumache
WARNING: experimental flag squash is removed with BuildKit. You should squash inside build using a multi-stage Dockerfile for efficiency.
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 663B done
#1 DONE 0.0s

#2 [internal] load .dockerignore
#2 transferring context: 2B done
#2 DONE 0.0s

#3 resolve image config for docker.io/docker/dockerfile:1
#3 DONE 0.3s

#4 docker-image://docker.io/docker/dockerfile:1@sha256:b6afd42430b15f2d2a4c5a02b919e98a525b785b1aaff16747d2f623364e39b6
#4 CACHED

#5 [internal] load build definition from Dockerfile
#5 DONE 0.0s

#6 [internal] load metadata for docker.io/ocurrent/opam-staging@sha256:de1c0887231de0c25a6d8c01388aac86326aef5f70c6d095908faf70007b143d
#6 DONE 0.7s

#7 [internal] load .dockerignore
#7 DONE 0.0s

#8 [1/5] FROM docker.io/ocurrent/opam-staging@sha256:de1c0887231de0c25a6d8c01388aac86326aef5f70c6d095908faf70007b143d
#8 resolve docker.io/ocurrent/opam-staging@sha256:de1c0887231de0c25a6d8c01388aac86326aef5f70c6d095908faf70007b143d done
#8 DONE 1.0s

#9 [internal] load build context
#9 transferring context: 663B done
#9 DONE 0.0s

#10 [2/8] RUN apt-get -y update
#10 1.359 Hit:1 http://deb.debian.org/debian bookworm InRelease
#10 1.395 Hit:2 http://deb.debian.org/debian bookworm-updates InRelease
#10 1.450 Hit:3 http://deb.debian.org/debian-security bookworm-security InRelease
#10 1.575 Reading package lists...
#10 DONE 2.3s

#11 [3/8] RUN DEBIAN_FRONTEND=noninteractive apt-get -y upgrade
#11 0.826 Reading package lists...
#11 1.382 Building dependency tree...
#11 1.485 Reading state information...
#11 1.510 Calculating upgrade...
#11 1.670 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
#11 DONE 1.7s

#12 [4/8] RUN DEBIAN_FRONTEND=noninteractive apt-get -y install libzstd-dev
#12 0.844 Reading package lists...
#12 1.417 Building dependency tree...
#12 1.514 Reading state information...
#12 1.676 The following NEW packages will be installed:
#12 1.676   libzstd-dev
#12 1.847 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
#12 1.847 Need to get 354 kB of archives.
#12 1.847 After this operation, 1253 kB of additional disk space will be used.
#12 1.847 Get:1 http://deb.debian.org/debian bookworm/main amd64 libzstd-dev amd64 1.5.4+dfsg2-5 [354 kB]
#12 2.406 debconf: delaying package configuration, since apt-utils is not installed
#12 2.430 Fetched 354 kB in 1s (701 kB/s)
#12 2.450 Selecting previously unselected package libzstd-dev:amd64.
#12 2.450 (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 ... 18755 files and directories currently installed.)
#12 2.466 Preparing to unpack .../libzstd-dev_1.5.4+dfsg2-5_amd64.deb ...
#12 2.467 Unpacking libzstd-dev:amd64 (1.5.4+dfsg2-5) ...
#12 2.525 Setting up libzstd-dev:amd64 (1.5.4+dfsg2-5) ...
#12 DONE 2.7s

#13 [5/8] RUN opam switch create 5.3 --packages=ocaml-base-compiler.5.3.0
#13 4.653 
#13 4.653 <><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
#13 4.999 [ocaml-config.3/gen_ocaml_config.ml.in] downloaded from https://opam.ocaml.org/cache
#13 6.224 [ocaml-config.3/ocaml-config.install] downloaded from https://opam.ocaml.org/cache
#13 10.99 [ocaml-compiler.5.3.0] downloaded from cache at https://opam.ocaml.org/cache
#13 12.21 [ocaml-compiler.5.3.0/ocaml-compiler.install] downloaded from https://opam.ocaml.org/cache
#13 12.21 
#13 12.21 <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
#13 12.62 -> installed base-bigarray.base
#13 12.63 -> installed base-threads.base
#13 12.66 -> installed base-unix.base
#13 12.66 -> installed ocaml-options-vanilla.1
#13 201.8 -> installed ocaml-compiler.5.3.0
#13 201.9 -> installed ocaml-base-compiler.5.3.0
#13 201.9 -> installed ocaml-config.3
#13 202.1 -> installed ocaml.5.3.0
#13 202.1 -> installed base-domains.base
#13 202.1 -> installed base-effects.base
#13 202.2 -> installed base-nnp.base
#13 202.6 Done.
#13 202.6 # Run eval $(opam env) to update the current shell environment
#13 DONE 202.8s

#14 [6/8] RUN opam pin add -k version ocaml-base-compiler 5.3.0
#14 1.075 ocaml-base-compiler is now pinned to version 5.3.0
#14 1.075 
#14 4.137 No package build needed.
#14 4.137 Nothing to do.
#14 4.137 # Run eval $(opam env) to update the current shell environment
#14 DONE 4.2s

#15 [7/8] RUN opam install -y opam-depext
#15 4.690 The following actions will be performed:
#15 4.690   - install opam-depext 1.2.3
#15 4.691 
#15 4.691 <><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
#15 4.814 [opam-depext.1.2.3] downloaded from cache at https://opam.ocaml.org/cache
#15 4.838 
#15 4.838 <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
#15 6.448 -> installed opam-depext.1.2.3
#15 6.454 Done.
#15 6.454 # Run eval $(opam env) to update the current shell environment
#15 DONE 6.5s

#16 [8/8] COPY --link [ Dockerfile, /Dockerfile.ocaml ]
#16 DONE 0.1s

#17 exporting to image
#17 exporting layers
#17 exporting layers 4.0s done
#17 writing image sha256:4ac15951e7067232f5358c0d91bc3aa490b62428be1a1b155bce2d5baf363543 done
#17 DONE 4.1s

 1 warning found (use docker --debug to expand):
 - JSONArgsRecommended: JSON arguments recommended for CMD to prevent unintended behavior related to OS signals (line 14)
Pushing "sha256:4ac15951e7067232f5358c0d91bc3aa490b62428be1a1b155bce2d5baf363543" to "ocurrent/opam-staging:debian-12-ocaml-5.3-amd64" as user "ocurrentbuilder"
Login Succeeded
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debian-12-ocaml-5.3-amd64: digest: sha256:aea346e70da13646efc5227d9bfe4cdf3978165dbffebce7be90565c397b4ec0 size: 10332
Job succeeded
2026-03-16 11:05.10: Job succeeded