Skipping non-native derivations even when supported by extra-platforms about nix-fast-build HOT 4 CLOSED

nix run github:Mic92/nix-fast-build -- --systems "aarch64-linux x86_64-linux" should work.

from nix-fast-build.

Afaik this option is set by the binfmt wrapper as well. But since emulation is slow, I would not want to make check the value of extra-platforms to decide what systems to build. The explicit --systems flag seems like a better trade off that will also work if remote builders are used.

from nix-fast-build.

--systems is what I went with as well

Re: binfmt wrapper

Afaiu with the ubuntu runners one has to passthe flag manually

Re: what systems to build based on extra platforms

I had to pass the .#checks.${system} manually anyway, which is why I thought it weird that nixfastbuild performs additional filtering

from nix-fast-build.

It uses nix-eval-jobs to get the system of builds and does the filtering there.
It does not try to figure out the system based the flake attr path yet since this may be not well defined in some cases. Once we got flake schema we can re-think that.

from nix-fast-build.