Replying to myself here as I can't edit any more: this bugfix needs cargo support to become active, which has still to arrive: https://github.com/rust-lang/carg

Replying to myself here as I can't edit any more: this bugfix needs cargo support to become active, which has still to arrive: https://github.com/rust-lang/cargo/pull/7315 https://github.com/rust-lang/cargo/pull/7315