Cppia extraClasspaths broken?

[datee]

So testing out the latest versions it seems to be some issue with cppia compilation and extraClasspaths:

in UhxConfig.hx: config.extraStaticClasspaths = ['C:/dev/UE4Libs/haxe'];

in TestActor.hx (example)

import com.testproject.TestUtils; | | TestUtils.testFunc();

Compiling cppia only Compilation error: Type not found: com.testproject.TestUtils

Haxe/BuildTool/interp/uhx/build/MacroHelper.hx:62: Error while parsing "extraStaticClasspaths" [C:/dev/UE4Libs/haxe] : Invalid char 67 at position 1

Compiling cppia only

~~Static compilation works fine for all files including the ones in "script" - the problem only happens with "Compiling cppia only"~~

[EDIT] : I have tested this on 2 different computers - UE4.22 and UE4.21 [Windows 10] Haxe 4 rc3 / hxcpp 4.0.19 and Haxe 4 rc2 / hxcpp 4.0.8 Also happening on Haxe 3.4.7 / hxcpp 4.0.8

Same error on all tests.