$NetBSD$

Assume posix for non-windows.

--- TheForceEngine/TFE_FileSystem/CMakeLists.txt.orig	2023-08-02 00:48:43.000000000 +0000
+++ TheForceEngine/TFE_FileSystem/CMakeLists.txt
@@ -4,7 +4,7 @@ if(WIN32)
 		"${CMAKE_CURRENT_SOURCE_DIR}/fileutil.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/paths.cpp"
         )
-elseif(LINUX)
+else()
 	target_sources(tfe PRIVATE
 		"${CMAKE_CURRENT_SOURCE_DIR}/filestream-posix.cpp"
 		"${CMAKE_CURRENT_SOURCE_DIR}/fileutil-posix.cpp"