MUSL Missing ALSA Dependency

[AidFTech]

Hi, so, for the project I've been working on, I abandoned the idea of using a separate library for sockets. I think I have that working in Rust. My Buildroot Pi is missing a lot of dependencies, though, and since there is no easy way to see what those are without terminal access, I figured I would try an old recommendation and build with MUSL.

I am running apt-get install libasound2-dev as part of the prebuild but still getting this error...

Thoughts? Thanks in advance, sorry to keep bothering this forum! (I am still a bit new to Rust)

Update I'm thinking maybe I need a static library for ALSA- I tried creating one on the Raspberry Pi running Raspbian and copying it to /usr/lib/aarch64-linux-unknown-gnu, but that didn't work. Is there somewhere else I need to put it? Is there another command I need to run? Is there a way to check that it was even generated correctly?

[Emilgardis]

Could uou show us your Cross.toml that youve tried so far? Also please avoid taking pictures with a camera of the screen 😅 better to just copy the text as text 👍

[AidFTech]

Sorry about that, I posted that from my phone, that was all I had access to.

Cross.toml:

[target.aarch64-unknown-linux-musl]
pre-build = [
    "dpkg --add-architecture arm64 && apt-get update && apt-get install -y libasound2-dev:arm64 libssl-dev:arm64 openssl:arm64",
]

[target.aarch64-unknown-linux-musl.env]
passthrough = [
    "PKG_CONFIG_ALLOW_CROSS=1",
    "PKG_CONFIG_PATH=/usr/lib/aarch64-linux-gnu/pkgconfig",
    "PKG_CONFIG_SYSROOT_DIR=/"
]

There is no directory for aarch64-linux-musl on my system, at least, not that I can see.

I'm wondering if MUSL is even the best course of action here. It might be MPV missing the dependencies and not my program...