Cargo Features

bevy_diagnostic has no features set by default.

[dependencies]
bevy_diagnostic = { version = "0.15.0-rc.3", features = ["dynamic_linking", "sysinfo_plugin"] }
dynamic_linking

Disables diagnostics that are unsupported when Bevy is dynamically linked

sysinfo_plugin = sysinfo

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

sysinfo mac linux win android freebsd sysinfo_plugin?