-Z unstable flags not passed to build command

[teamplayer3]

executed command:

cargo size --release --verbose -Z unstable-options

verbose output:

"/usr/local/rustup/toolchains/nightly-2022-06-15-x86_64-unknown-linux-gnu/bin/cargo" "build" "--release" "--message-format=json"
error: the `--out-dir` flag is unstable, pass `-Z unstable-options` to enable it
See https://github.com/rust-lang/cargo/issues/6790 for more information about the `--out-dir` flag.
error: Failed to parse crate metadata

binutils version:

0.3.6