diff --git a/platformio.ini b/platformio.ini
index b35a3875..a01838ae 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -71,6 +71,13 @@ lib_deps =
   InputManager=symlink://freeink-sdk/libs/hardware/InputManager
   EInkDisplay=symlink://freeink-sdk/libs/display/FreeInkDisplay
   SDCardManager=symlink://freeink-sdk/libs/hardware/SDCardManager
+  ; FreeInk HAL support libs the above depend on (BoardConfig pin maps, etc.).
+  BoardConfig=symlink://freeink-sdk/libs/hardware/BoardConfig
+  PowerManager=symlink://freeink-sdk/libs/hardware/PowerManager
+  Rtc=symlink://freeink-sdk/libs/hardware/Rtc
+  Imu=symlink://freeink-sdk/libs/hardware/Imu
+  FreeInkUI=symlink://freeink-sdk/libs/ui/FreeInkUI
+  Icons=symlink://freeink-sdk/libs/assets/Icons
   BleKeyboardHost=symlink://freeink-sdk/libs/network/BleKeyboardHost
   h2zero/NimBLE-Arduino @ ^2.3.8
   bblanchon/ArduinoJson @ 7.4.2