Run docker build .
The error is:
3.944 = note: /target/debug/deps/pure_nix_repro-f2775a2bb21016af.3jpem8iwsy31qben.rcgu.o: In function `nix::sys::memfd::memfd_create':
3.944 //usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/nix-0.27.1/src/sys/memfd.rs:57: undefined reference to `memfd_create'
3.944 collect2: error: ld returned 1 exit status
The failing code is there: ./pure_nix_repro/src/main.rs