build fails on aarch64 due to outdated nix crate

[craftyguy]

When attempting to build display-switch on aarch64, nix-0.10.0 fails to compile (see nix-rust/nix#951):

   Compiling nix v0.10.0
error[E0425]: cannot find value `MAP_32BIT` in crate `libc`
  --> /home/clayton/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nix-0.10.0/src/sys/mman.rs:49:9
   |
49 |         MAP_32BIT;
   |         ^^^^^^^^^ not found in `libc`

Looks like uinput depends on an old version of nix (0.10), that is missing this patch: nix-rust/nix@7f0fb19 It also looks like the uinput crate hasn't seen updates in years (there's an open MR to use a later nix version...)

[craftyguy]

@haimgel hey just curious if you have any ideas for how to proceed here... I've been trying to package the latest version of display-switch in Alpine but haven't been able to build it because of this failure :(

https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/70584

[haimgel]

Well, this sucks! There's no way today in Rust to force-update a transitive dependency from the same source, so I cannot upgrade nix for uinput.

The only way I can think this can be addressed today is to replace uinput (which is only used to wake up displays on Linux) with more up-to-date. However, musl-based systems are not on top of my priorities because they are not widely used as desktop systems, so I won't be able to look into this in a short or medium term.