package clap_derive v4.5.3 cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.72.1
Dockerfile currently specifying FROM rust:1.72-buster AS rust
Tag rust:1.76.0-buster was pushed five days ago, presumably 1.74 was before that as well.
Am tentatively building with 1.76, will report back finding in this ticket.