diff --git a/platformio.ini b/platformio.ini
index c594a033..1e31ab0c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -60,8 +60,8 @@ lib_deps_all =
     ${common.lib_deps_rgbled}
     ${common.lib_deps_gps}
 build_flags_basic =
-    -include $PROJECT_DIR/src/hal/${PIOENV}.h
-    -include $PROJECT_DIR/src/paxcounter.conf
+    -include "src/hal/${PIOENV}.h"
+    -include "src/paxcounter.conf"
     -w
     '-DARDUINO_LMIC_PROJECT_CONFIG_H=../../../src/lmic_config.h'
     '-DCORE_DEBUG_LEVEL=${common.debug_level}'