$ uname -a
OpenBSD x395.sweet.home 7.5 GENERIC.MP#82 amd64
$ cargo --version
cargo 1.77.0
$ rustc --version
rustc 1.77.0 (aedd173a2 2024-03-17) (built from a source tarball)
$ cargo build --release
[..]
error[E0432]: unresolved imports `backend::MidiInputPort`, `backend::MidiInput`, `backend::MidiInputConnection`, `backend::MidiOutputPort`, `backend::MidiOutput`, `backend::MidiOutputConnection`
  --> /home/holsta/.cargo/registry/src/index.crates.io-6f17d22bba15001f/midir-0.9.1/src/common.rs:5:5
   |
5  |     MidiInputPort as MidiInputPortImpl,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiInputPort` in `backend`
6  |     MidiInput as MidiInputImpl,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiInput` in `backend`
7  |     MidiInputConnection as MidiInputConnectionImpl,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiInputConnection` in `backend`
8  |     MidiOutputPort as MidiOutputPortImpl,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiOutputPort` in `backend`
9  |     MidiOutput as MidiOutputImpl,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiOutput` in `backend`
10 |     MidiOutputConnection as MidiOutputConnectionImpl
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `MidiOutputConnection` in `backend`
   |
   = help: consider importing this struct through its public re-export instead:
           MidiInputPort
   = help: consider importing this struct through its public re-export instead:
           MidiInput
   = help: consider importing this struct through its public re-export instead:
           MidiInputConnection
   = help: consider importing this struct through its public re-export instead:
           MidiOutputPort
   = help: consider importing this struct through its public re-export instead:
           MidiOutput
   = help: consider importing this struct through its public re-export instead:
           MidiOutputConnection

For more information about this error, try `rustc --explain E0432`.
error: could not compile `midir` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...