[jeffbee]

That's cool. I was not able to repro due to the buck2 instructions not working for me, two different ways

   Compiling gazebo v0.8.1 (/home/jwb/buck2/gazebo/gazebo)
  error[E0554]: `#![feature]` may not be used on the stable release channel
  --> gazebo/gazebo/src/lib.rs:10:49

Then with the alternate instructions:

  error: no such command: `+nightly-2023-01-24`
 Cargo does not handle `+toolchain` directives.
 Did you mean to invoke `cargo` through `rustup` instead?

[fanzeyi]

It looks like you don't have rustup.rs. You will need to install that since Buck2 is depending on nightly Rust features.

[yencabulator]

FWIW buck2 doesn't seem to build with nightly-2023-01-24 at this time, nightly-2023-03-15 worked for me. (Nightlies from April cause an internal compiler error.)