mm_basedir Not Working in CS2

[LianZiZhou]

Setting +mm_basedir "addons/metamod_ac" has no effect in CS2.

mm_basedir
Unknown command 'mm_basedir'!
meta alias
Alias      File
 ---
counterst  addons/counterstrikesharp/bin/win64/counterstrikesharp
 ---
1 aliases total.

I modified the vdf of counterstrikesharp in addons/metamod_ac, the expected behavior is to load addons/counterstrikesharp_ac/bin/win64/counterstrikesharp.
counterstrikesharp.vdf in addons/metamod_ac

"Metamod Plugin"
{
	"alias"	"counterstrikesharp"
	"file"	"addons/counterstrikesharp_ac/bin/win64/counterstrikesharp"
}

[psychonic]

ConVars in MM:S (including mm_basedir) are known to not function at the moment in Source 2 games until #135 is finished.