Fix vpaths if not using new structure

premake5.lua

@@ -1,6 +1,3 @@
--- protoc tool
-protocBinPath = path.translate(path.join(_MAIN_SCRIPT_DIR, "tools", "protoc.exe"))
-
 -- Option to allow copying the DLL file to a custom folder after build
 newoption {
 	trigger = "copy-to",
@@ -133,6 +130,12 @@ workspace "iw4x"
 			"./deps/Wink-Signals",
 		}
 		
+		-- fix vpaths for protobuf sources
+		vpaths {
+			["*"] = { "./src/**" },
+			["Proto/*"] = { "./build/src/proto/**" }, -- seems like we need 'build' here
+		}
+
 		-- Virtual paths
 		if not _OPTIONS["no-new-structure"] then
 			vpaths {