Target x86_64-unknown-linux-musl fails to link

Yes... I think so. Here are the commands I run (either in a container or WSL2):

sudo apt update &&
sudo apt upgrade -y
&& sudo apt install -y pkg-config musl-dev musl-tools libx11-dev libxkbfile-dev libxkbfile-dev libfreetype6-dev libfontconfig libfontconfig1-dev libstdc++6 python3
sudo ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /usr/lib/x86_64-linux-gnu/libstdc++.so