There is a new pull request by fosslinux against master on the void-packages repository

https://github.com/fosslinux/void-packages PyInstaller-4.0
https://github.com/void-linux/void-packages/pull/24597

PyInstaller: update to 4.0, fix bootstrap.
Updated to 4.0. 

The bootstrap binaries are coded in C and distributed pre-compiled
for x86_64 and i686. PyInstaller was noarch and using these bootstrap
binaries. This caused PyInstaller to essentially not work properly
for most packages on non-x86_64 and i686.

Recompile the bootstrap binaries and remove noarch.

A patch file from https://github.com/void-linux/void-packages/pull/24597.patch is attached