diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ca0af0..031f03a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,30 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 message("Compiling MTL for ${CMAKE_SYSTEM_PROCESSOR}")
 
+# Adds the sources to the target if there is not already a source with the
+# same filename (ie. no clobber/noc). (Note, the files can be in different directories)
+function(target_sources_noc target linkage sources)
+	get_target_property(cur_sources ${target} SOURCES)
+
+	foreach(src_fq ${sources})
+		cmake_path(GET src_fq FILENAME src)
+		set(already_exists false)
+
+		# Check if the source already exists
+		foreach (csrc_fq ${cur_sources})
+			cmake_path(GET csrc_fq FILENAME csrc)
+			if (src STREQUAL csrc)
+				set(already_exists true)
+				break()
+			endif()
+		endforeach()
+
+		if (NOT already_exists)
+			target_sources(${target} ${linkage} "${src_fq}")
+		endif()
+	endforeach()
+endfunction()
+
 # CONFIGURE_DEPENDS option was added in CMake v3.12. This option allows the
 # build system to automatically re-run CMake if the glob changes, solving the
 # major issue with globbing. May have a performance impact, but it should be
@@ -19,20 +43,23 @@ set(mtl_include_debug "include/debug")
 
 add_library(${PROJECT_NAME} STATIC)
 
-target_sources(${PROJECT_NAME} PRIVATE "${mtl_sources_common}")
-target_include_directories(${PROJECT_NAME} PUBLIC "${mtl_include_common}")
+set(mtl_processor_generic true)
+set(mtl_platform_generic true)
 
-if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-	target_sources(${PROJECT_NAME} PRIVATE "${mtl_sources_debug}")
-	target_include_directories(${PROJECT_NAME} PUBLIC "${mtl_include_debug}")
+if (CMAKE_SYSTEM_NAME STREQUAL "NintendoGBA")
+	target_sources_noc(${PROJECT_NAME} PRIVATE "${mtl_sources_gba}")
 endif()
 
 if (CMAKE_SYSTEM_PROCESSOR STREQUAL "armv4t")
-	target_sources(${PROJECT_NAME} PRIVATE "${mtl_sources_armv4t}")
+	target_sources_noc(${PROJECT_NAME} PRIVATE "${mtl_sources_armv4t}")
 endif()
 
-if (CMAKE_SYSTEM_NAME STREQUAL "NintendoGBA")
-	target_sources(${PROJECT_NAME} PRIVATE "${mtl_sources_gba}")
+target_sources_noc(${PROJECT_NAME} PRIVATE "${mtl_sources_common}")
+target_include_directories(${PROJECT_NAME} PUBLIC "${mtl_include_common}")
+
+if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+	target_sources_noc(${PROJECT_NAME} PRIVATE "${mtl_sources_debug}")
+	target_include_directories(${PROJECT_NAME} PUBLIC "${mtl_include_debug}")
 endif()
 
 # TODO: Support installing library