(for PR #23309)

2025-02-10 15:07.48: New job: Lint
2025-02-10 15:07.48: Checking out commit 6b62b33f. To reproduce:
                       git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/23309/head" && git reset --hard 6b62b33f
2025-02-10 15:07.48: Exec: "cp" "-a" "--" "/var/lib/ocurrent/var/git/opam-repository.git-a0bc4b41ddb868605dc1500002c27cfa79faf4389fe53b6754817ea16b48d458/.git" 
                           "/tmp/git-checkout104fb6dd"
2025-02-10 15:07.49: Exec: "git" "-C" "/tmp/git-checkout104fb6dd" "submodule" 
                           "deinit" "--force" "--all"
2025-02-10 15:07.49: Exec: "git" "-C" "/tmp/git-checkout104fb6dd" "reset" 
                           "--hard" "-q" "6b62b33f94fa0d7f64aa4da5cb0c75e78fa3b3ee"
2025-02-10 15:07.56: Exec: "git" "-c" "protocol.file.allow=always" "-C" 
                           "/tmp/git-checkout104fb6dd" "submodule" "update" 
                           "--recursive" "--init" "--no-fetch"
2025-02-10 15:07.56: Exec: "git" "merge" "-q" "--" "36f4d2d5ceb882a79fd7d7f956b490201da67226"

To reproduce locally, on the opam-repository PR branch, run: 

    opam pin opam-ci-check git+https://github.com/ocurrent/opam-repo-ci.git#live
    opam-ci-check lint --opam-repository . odnnr.2.0.3:new=false

2025-02-10 15:08.04: Exec: "opam-ci-check" "lint" "--opam-repository" 
                           "." "odnnr.2.0.3:new=false"
Linting opam-repository at /tmp/git-checkout104fb6dd/. ...
Error in odnnr.2.0.3: Weak checksum algorithm(s) provided. Please use SHA-256 or SHA-512. Details: opam field url contains only MD5 as checksum for v2.0.3.tar.gz
Error in odnnr.2.0.3: Weak checksum algorithm(s) provided. Please use SHA-256 or SHA-512. Details: opam field extra-files contains only MD5 as checksum for install_keras.r
Error in odnnr.2.0.3: Unexpected file in packages/odnnr/odnnr.2.0.3/files
Error in odnnr.2.0.3: extra-files present. This is not allowed in the opam-repository. Please use extra-source instead.
2025-02-10 15:08.32: Job failed: Error in odnnr.2.0.3: extra-files present. This is not allowed in the opam-repository. Please use extra-source instead.
Error in odnnr.2.0.3: Unexpected file in packages/odnnr/odnnr.2.0.3/files
Error in odnnr.2.0.3: Weak checksum algorithm(s) provided. Please use SHA-256 or SHA-512. Details: opam field extra-files contains only MD5 as checksum for install_keras.r
Error in odnnr.2.0.3: Weak checksum algorithm(s) provided. Please use SHA-256 or SHA-512. Details: opam field url contains only MD5 as checksum for v2.0.3.tar.gz