On 17-09-2022 13:55, Daniel Sockwell via Bug reports for GNU Guix wrote: > --> /tmp/guix-build-tealdeer-1.4.1.drv-0/tealdeer-1.4.1/guix-vendor/rust-pin-project-internal-0.4.22.tar.gz/src/pin_project/derive.rs:859:67 In antioxidant, I noticed that rust-pin-project-internal@0.4 doesn't build so I replaced it with rust-pin-project-internal@1 (and likewise for rust-pin-project). Maybe the same issue was present in the original cargo-build-system using code, and a similar fix would work? Greetings, Maxime.