rustc-version has the same issue as rust-lang/cargo#10885: it will by default ignore RUSTC_WRAPPER, so tools that expect to intercept all communication between a build and rustc by setting the wrapper will get entirely bypassed. If the wrapper ends up invoking an entirely different version of rustc than what is in the PATH, that can lead to incorrect results (e.g. when rustc-version is used from a build script).