Nix S3 binary cache settings

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1

Nix S3 binary cache references a bunch of settings in the manual, like compression

But how do I change them? nix help copy does not provide any hints.

2

I think they’re just passed as parameters in the store URL?

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3

You are right, and it does validate the settings, i.e if you try to pass something random:

error: Boolean setting 'want-mass-query' has invalid value 'hello'
Try 'nix --help' for more information.
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