Portable lock dirs break depext resolution

[Leonidas-from-XIV]

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Expected Behavior

$ DUNE_CONFIG__PORTABLE_LOCK_DIR=enabled dune pkg lock
$ DUNE_CONFIG__PORTABLE_LOCK_DIR=enabled dune show depext
libgmp-dev

Actual Behavior

$ DUNE_CONFIG__PORTABLE_LOCK_DIR=enabled dune pkg lock
$ DUNE_CONFIG__PORTABLE_LOCK_DIR=enabled dune show depext

The output is empty.

Reproduction

I've tested it by unpacking mysql_protocol.3.0.3 (which pulls in conf-gmp which has depexts) however I don't think there is anything particularly specific about mysql_protocol, it's probably the case with all depexts as evidenced by the regressions of the Dune build in opam-health-check.

• PR with a reproducing test: #11825

Specifications

• Version of dune (output of dune --version): main
• Version of ocaml (output of ocamlc --version): 5.2.1
• Operating system (distribution and version): Fedora 42

Additional information

• Link to gist with verbose output (run dune with the --verbose flag):

[gridbugs]

Thanks for the repro @Leonidas-from-XIV! I'll investigate.

[gridbugs]

Fixed in https://github.com/ocaml/dune/pull/11828

[Leonidas-from-XIV]

The fix has been merged, I'll close this issue in the meantime.