[Nix-dev] NIX_ENFORCE_NO_NATIVE

[Vladimír Čunát]

On 06/08/2016 04:14 PM, Andreas Herrmann wrote:
> Especially, when being run outside of a nix-builder.

IIRC its' conditioned on $NIX_ENFORCE_NO_NATIVE exactly in order not to
be filtered out when run outside a nix builder. IMO that's a good
default. Hydra isn't the only reason; many devs use remote builds or
nix-copy-closure.

If you do want -march or -mtune in mkDerivation, you may either set
NIX_ENFORCE_NO_NATIVE = false; or even better, specify it explicitly,
e.g. -march=btver1

--Vladimir


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