By default Rust statically links the Rust runtime library, so yeah, 2 MB is roughly it. You can get around it by linking dynamically, and uutils also supports b

By default Rust statically links the Rust runtime library, so yeah, 2 MB is roughly it. You can get around it by linking dynamically, and uutils also supports busybox style single binary + links installation (that is, check argv[0] (or whatever the equivalent in Rust is) for which code to run).