diff --git a/firmware/CMakeLists.txt b/firmware/CMakeLists.txt
index 1f9ae191..3f21fc5a 100644
--- a/firmware/CMakeLists.txt
+++ b/firmware/CMakeLists.txt
@@ -26,11 +26,4 @@ set(CMAKE_TOOLCHAIN_FILE toolchain-arm-cortex-m.cmake)
 project (hackrf_firmware_all)
 
 add_subdirectory(blinky)
-add_subdirectory(mixertx)
-add_subdirectory(sgpio)
-add_subdirectory(sgpio-rx)
-add_subdirectory(simpletx)
-add_subdirectory(startup)
-add_subdirectory(startup_systick)
-add_subdirectory(startup_systick_perfo)
 add_subdirectory(hackrf_usb)