How to use hot reload inside a project?

[supemeko]

Hot reload takes effect when I execute the bevy example hot_asset_reloading. Instead, I simply configured the cargo.toml dependency and then put the same code in main.rs, and the hot reload didn't take effect.

So what else do I need for hot reload to work? Am I missing any key information?

[package]
name = "bevy_test"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies.bevy]
version = "0.11"

[supemeko]

Seems to be because I set the environment variable

export BEVY_ASSET_ROOT="."
cargo run