It is recommended to install container manager [Distrobox](https://distrobox.it/) to install packages from other distributions like Void Linux. This can be necessary for application which are not compatible on Musl or are to annoying to compile on Gentoo. Installation is straight forward, simply add the correct USE flags and emerge the necessary packages:
Because Steam is propriatary it has been compiled against Glibc which means it can't run on Musl. Luckily a container can run it. Once in the container install the necessary packages: