2023-09-26 13:40.06: New job: Build Dockerfile using linux-x86_64 in
                                [https://github.com/ocurrent/opam-health-check.git#refs/heads/macos-ci (aef0f1423ad7393766b1a0b7f2bebeeb44a77bfe)]
2023-09-26 13:40.06: Using cache hint "https://github.com/ocurrent/opam-health-check.git-Dockerfile"
2023-09-26 13:40.06: Connecting to build cluster…
2023-09-26 13:40.06: Waiting for resource in pool OCluster
2023-09-26 13:40.06: Waiting for worker…
2023-09-26 13:40.57: Got resource from pool OCluster
Building on toxis.caelum.ci.dev
All commits already cached
HEAD is now at aef0f14 Remove duplicated match for failures and partial failures (underlying issue was fixed in cfbc35f)
error: could not lock config file .git/modules/ocluster/config: No such file or directory
warning: Could not unset core.worktree setting in submodule 'ocluster'
Cleared directory 'ocluster'
Submodule 'ocluster' (https://github.com/patricoferris/ocluster) registered for path 'ocluster'
Cloning into '/var/cache/obuilder/ocluster/git/opam-health-check.git-98601c60f4b09dd0f4e5a6b3fa7e2a2d8de0bb52/ocluster'...
Submodule path 'ocluster': checked out '76c495806f857795371f40edb649df62002dc339'
Submodule 'obuilder' (https://github.com/patricoferris/obuilder.git) registered for path 'ocluster/obuilder'
Cloning into '/var/cache/obuilder/ocluster/git/opam-health-check.git-98601c60f4b09dd0f4e5a6b3fa7e2a2d8de0bb52/ocluster/obuilder'...
Submodule path 'ocluster/obuilder': checked out 'ea06fca71311f701b9c49896143737918b3bd79a'
"Dockerfile" does not exist (in Dockerfile)
2023-09-26 13:40.59: Job failed: Failed: Build failed