main.c:22:10: fatal error: 'libdfu.h' file not found
  #include "libdfu.h"
           ^~~~~~~~~~
  commands.c:28:10: fatal error: 'commands.h' file not found
  #include "commands.h"
           ^~~~~~~~~~~~
  intel_hex.c:39:10: fatal error: 'intel_hex.h' file not found
  #include "intel_hex.h"
           ^~~~~~~~~~~~~
  1 error generated.
  make[1]: *** [main.o] Error 1
  make[1]: *** Waiting for unfinished jobs....
  stm32.c:27:10: fatal error: 'dfu-device.h' file not found
  #include "dfu-device.h"
           ^~~~~~~~~~~~~~
  atmel.c:31:10: fatal error: 'dfu-device.h' file not found
  #include "dfu-device.h"
           ^~~~~~~~~~~~~~
  arguments.c:28:10: fatal error: 'dfu-device.h' file not found
  #include "dfu-device.h"
           ^~~~~~~~~~~~~~
  dfu.c:30:10: fatal error: 'dfu.h' file not found
  #include "dfu.h"
           ^~~~~~~
  libdfu.c:25:10: fatal error: 'dfu-device.h' file not found
  #include "dfu-device.h"
           ^~~~~~~~~~~~~~
  1 error generated.
  1 error generated.
  1 error generated.
  1 error generated.