diff --git a/pkgs/development/python-modules/busylight-for-humans/default.nix b/pkgs/development/python-modules/busylight-for-humans/default.nix
index 1cbb1d14136c..86fd257dc232 100644
--- a/pkgs/development/python-modules/busylight-for-humans/default.nix
+++ b/pkgs/development/python-modules/busylight-for-humans/default.nix
@@ -3,6 +3,7 @@
   bitvector-for-humans,
   buildPythonPackage,
   fetchFromGitHub,
+  fastapi,
   hidapi,
   loguru,
   poetry-core,
@@ -11,6 +12,7 @@
   pytestCheckHook,
   pythonOlder,
   typer,
+  uvicorn,
   webcolors,
   udevCheckHook,
 }:
@@ -40,6 +42,13 @@ buildPythonPackage rec {
     webcolors
   ];
 
+  optional-dependencies = {
+    webapi = [
+      fastapi
+      uvicorn
+    ];
+  };
+
   nativeCheckInputs = [
     pytestCheckHook
     pytest-mock