error[E0692]: transparent struct cannot have other repr hints
  --> /home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/nix-0.22.0/src/sys/statvfs.rs:15:12
   |
13 | / libc_bitflags!(
14 | |     /// File system mount Flags
15 | |     #[repr(C)]
   | |            ^
16 | |     #[derive(Default)]
...  |
52 | |     }
53 | | );
   | |__^
   |
   = note: this error originates in the macro `::bitflags::bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0692`.