[GitHub] Update install-nix-action to version 31

[hugtalbot]

Changes according to cachix/install-nix-action#224

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By submitting this pull request, I acknowledge that
I have read, understand, and agree SOFA Developer Certificate of Origin (DCO).

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Reviewers will merge this pull-request only if

• it builds with SUCCESS for all platforms on the CI.
• it does not generate new warnings.
• it does not generate new unit test failures.
• it does not generate new scene test failures.
• it does not break API compatibility.
• it is more than 1 week old (or has fast-merge label).

[fredroy]

@hugtalbot

I tried adding nholmann_json as a dependency as it was required to build, but now it is stuck on finding tight_inclusion which is not shipped by Nix (and certainly wont be).
Would it not be better to simply disable nix builds ?

Missed

[olivier-roussel]

I agree with @fredroy .
Unless somebody of us takes care of adding tight_inclusion to nix packages, it is quite unlikely this happens soon. So if we have nobody that can manage the nix support, may be we should drop it.
Also, we only have Nix support for SOFA, but not for any plugins right ? In this case it might be not quite useful.

[hugtalbot]

New dependencies appeared in SOFA (nholmann_json, tight_inclusion) however tight_inclusion is not yet distributed with Nix. @nim65s would you have guidelines about this in order to keep the CI running?

[nim65s]

the good long term solution is to add that package in nixpkgs.
the fast short term one is to add it here.

I'm doing both. that is https://github.com/Continuous-Collision-Detection/Tight-Inclusion, right ?