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Description
Is your feature request related to a problem?
Some derivations use limited hardware resources, such as KVM in NixOS tests.
It would be great if there was a way to limit the max-jobs used for derivations that require these resources, so that conflicts can be avoided.
Proposed solution
An derivation attribute could be added, containing a list of "resource names" that a derivation requires. Then, in nix-conf, the maximum number of concurrent builds for derivations that need each resource can be defined.
Alternative solutions
max-jobs can be set globally while building such derivations, but this prevents their dependencies from building concurrently too, which isn't ideal.
Additional context
Checklist
- checked latest Nix manual (source)
- checked open feature issues and pull requests for possible duplicates
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