diff --git a/pkgs/by-name/fl/flashfocus/package.nix b/pkgs/by-name/fl/flashfocus/package.nix
index 1668b2611fb5..fbc50c1eec05 100644
--- a/pkgs/by-name/fl/flashfocus/package.nix
+++ b/pkgs/by-name/fl/flashfocus/package.nix
@@ -38,6 +38,7 @@ python3Packages.buildPythonApplication rec {
   pythonRelaxDeps = [
     "pyyaml"
     "xcffib"
+    "cffi"
   ];
 
   propagatedBuildInputs = with python3Packages; [