How can I specify the --system option as an environment variable?

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1

I’m using an Apple Silicon MacBook.
Often specify --system = x86_64_darwin.
However, it is trouble to specify it every time, so I want to set environment variables. Is it possible to do this?

2

I’m using an Apple Silicon MacBook.

Nix also supports aarch64-darwin (the M1 chip), which use cases do you have which require intel arch?

3

It is needed to build software that depends on old nixpkgs, ghc, etc…

4

NIX_CONFIG="system = ..."