Bug Entities package crashes editor on start-up

Tested on the latest ~3 beta and full versions of Unity and various versions of the Entities package. Narrowed down the crash to whenever the Entities package is added either in the package manager UI or the manifest.json file. Without this package everything works fine. Running Arch Linux x64.

Error log:

Reloading assemblies after script compilation.

Begin MonoManager ReloadAssembly

Symbol file LoadedFromMemory is not a mono symbol file

Refreshing native plugins compatible for Editor in 0.38 ms, found 2 plugins.

Preloading 1 native plugins for Editor in 0.06 ms.

mesa: CommandLine Error: Option 'aarch64-enable-ccmp' registered more than once!

LLVM ERROR: inconsistency in registered CommandLine options

[Unity Package Manager (Upm)]

Parent process [22121] was terminated

 

This looks like it's related to https://bugs.llvm.org/show_bug.cgi?id=22952 (edit: and also https://bugs.llvm.org/show_bug.cgi?id=30587 )
I guess mesa and something ECS is embedding llvm for are clobbering each other.

 

News or workarounds? Can't build anything with burst or entities on linux (I'm using ubuntu.) They both give me this error:

: CommandLine Error: Option 'aarch64-enable-ccmp' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options