EDIT: changed the title of the issue to better reflect what is happening, see comment

Hi, I was trying out this awesome tool on some toy projects, but I can't seem to be able to get conditional compilation working via #[cfg(target_feature = "...")]. Am I just doing something wrong?

If I create a project with only this code:

fn main() {
    #[cfg(target_feature = "avx")]
    {
        println!("avx");
    }
    #[cfg(not(target_feature = "avx"))]
    {
        println!("no avx");
    }
}

and this inside Cargo.toml:

[package.metadata.multivers.x86_64]
cpus = [
	"x86-64",
	"x86-64-v2",
	"x86-64-v3",
	"x86-64-v4",
	"znver1",
	"znver2",
	"znver3",
	"znver4",
	"znver5",
]

then no avx is printed if ran via cargo run --release, and avx is printed if ran via RUSTFLAGS="-C target-feature=+avx" cargo run --release or RUSTFLAGS="-C target-cpu=native" cargo run --release.

However, if I run cargo +nightly multivers --out-dir . and then run the generated executable, no avx is printed when avx is expected.

I'm using Linux and my CPU is a 5000 series ryzen (znver3)