diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bf544bffe..6917886d33 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,7 +34,7 @@ set(PNG_TESTS  OFF CACHE BOOL "Build tests." FORCE)
 
 # Select the version of libpng to use, default is builtin
 if (NOT USE_SYSTEM_LIBPNG)
-	add_subdirectory( 3rdparty/libpng )
+	add_subdirectory(3rdparty/libpng EXCLUDE_FROM_ALL)
 endif()
 
 # TODO: do real installation, including copying directory structure
@@ -42,19 +42,19 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE "${PROJECT_BINARY_DIR}/bin")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "${PROJECT_BINARY_DIR}/bin")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO "${PROJECT_BINARY_DIR}/bin")
 
-add_subdirectory( Vulkan )
-add_subdirectory( rpcs3 )
+add_subdirectory(Vulkan EXCLUDE_FROM_ALL)
+add_subdirectory(rpcs3)
 
 include_directories(3rdparty/hidapi/hidapi)
 if(APPLE)
-	add_subdirectory(3rdparty/hidapi/mac)
+	add_subdirectory(3rdparty/hidapi/mac EXCLUDE_FROM_ALL)
 	#list(APPEND LIBS hidapi)
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	add_subdirectory(3rdparty/hidapi/linux)
+	add_subdirectory(3rdparty/hidapi/linux EXCLUDE_FROM_ALL)
 elseif(MSVC)
-	add_subdirectory(3rdparty/hidapi/windows)
+	add_subdirectory(3rdparty/hidapi/windows EXCLUDE_FROM_ALL)
 else()
-	add_subdirectory(3rdparty/hidapi/libusb)
+	add_subdirectory(3rdparty/hidapi/libusb EXCLUDE_FROM_ALL)
 	#list(APPEND LIBS hidapi-libusb)
 endif()
 
diff --git a/rpcs3/CMakeLists.txt b/rpcs3/CMakeLists.txt
index e8de36669c..a63602a2b9 100644
--- a/rpcs3/CMakeLists.txt
+++ b/rpcs3/CMakeLists.txt
@@ -202,7 +202,7 @@ if(NOT WITHOUT_LLVM)
 		option(WITH_POLLY OFF)
 
 		# LLVM needs to be built out-of-tree
-		add_subdirectory(../llvm ../llvm_build)
+		add_subdirectory(../llvm ../llvm_build EXCLUDE_FROM_ALL)
 		set(LLVM_DIR "${CMAKE_CURRENT_BINARY_DIR}/../llvm_build/lib/cmake/llvm/")
 
 		# now tries to find LLVM again