On the 'staging' branch, "librsvg-next" (a dependency of GNOME) fails to compile the 'xml-rs' Rust crate: --8<---------------cut here---------------start------------->8--- Compiling xml-rs v0.8.1 error[E0658]: `cfg(doctest)` is experimental and subject to change --> /tmp/guix-build-librsvg-2.46.4.drv-0/librsvg-2.46.4/vendor/rust-xml-rs-0.8.1.tar.gz/src/lib.rs:9:7 | 9 | #[cfg(doctest)] | ^^^^^^^ | = note: for more information, see https://github.com/rust-lang/rust/issues/62210 error[E0658]: `cfg(doctest)` is experimental and subject to change --> /tmp/guix-build-librsvg-2.46.4.drv-0/librsvg-2.46.4/vendor/rust-xml-rs-0.8.1.tar.gz/src/lib.rs:13:7 | 13 | #[cfg(doctest)] | ^^^^^^^ | = note: for more information, see https://github.com/rust-lang/rust/issues/62210 Compiling downcast-rs v1.1.1 Compiling rand_core v0.3.1 Compiling rand_jitter v0.1.4 error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0658`. error: could not compile `xml-rs`. warning: build failed, waiting for other jobs to finish... error: build failed --8<---------------cut here---------------end--------------->8---