diff --git a/pkgs/hass-color-recognizer/default.nix b/pkgs/hass-color-recognizer/default.nix
index 0f6141e..09ddb8f 100644
--- a/pkgs/hass-color-recognizer/default.nix
+++ b/pkgs/hass-color-recognizer/default.nix
@@ -16,11 +16,12 @@ buildHomeAssistantComponent {
     python3Packages.numpy
     python3Packages.scipy
     python3Packages.voluptuous
+    python3Packages.pillow
   ];
 
   doCheck = false;
 
-  pythonImportsCheck = [ "numpy" "scipy" "voluptuous" ];
+  pythonImportsCheck = [ "PIL" "numpy" "scipy" "voluptuous" ];
 
   installPhase = ''
     runHook preInstall