Testing a VM inside of a VM (the CI) is probably going to be a problem here.

Was there some progress on Big Sur that isn't yet reflected on moby/hyperkit#297 ?

Yes, moby/hyperkit#307

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If we can't test this in a sandbox, we may as well just get rid of the test block (or put in some trivial test that will work in a sandbox).

The current bottles are failing tests anyway...

If we can't test this in a sandbox, we may as well just get rid of the test block (or put in some trivial test that will work in a sandbox).

IMO the best option would be to leave the test but skip it on CI -- that way it at least can be run manually as part of formula maintenance. However I haven't had luck in the past with getting changes like that past review: #66485 (comment)

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There's been some changes so the VM environment so let's see if anything's changed here.

# Error: /usr/local/lib/ocaml/findlib/topfind.cmi
#        is not a compiled interface for this version of OCaml.

Did we not revsion bump ocaml-findlib when updating OCaml?

Unfortunately not: #71942

But CI didn't pick anything up with ocaml-findlib. ocaml-findlib was even used to build other formulae in the same PR.

But CI didn't pick anything up with ocaml-findlib. ocaml-findlib was even used to build other formulae in the same PR.

I suppose if it only uses the binary then there's no issues. There'll only be issues if it actually uses it as a library, and opam by default does not use system findlib (which the extra lines in this formula show).

This is certainly the first formula to use the topfind part.

Oops. We should probably add ocaml-findlib to the comment at the start of the ocaml formula then.

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Tried another run with updated ocaml-findlib, but now back to failing on testcase again.

EDIT: Haven't been able to get test to work locally, though I am trying via Rosetta layer.
Maybe someone more familiar with hyperkit can have a go at this.

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