diff --git a/pkgs/development/python-modules/detectron2/default.nix b/pkgs/development/python-modules/detectron2/default.nix
index e7870fbe4759..badf5bb08771 100644
--- a/pkgs/development/python-modules/detectron2/default.nix
+++ b/pkgs/development/python-modules/detectron2/default.nix
@@ -36,6 +36,7 @@
 , av
 , opencv4
 , pytest-mock
+, pybind11
 }:
 
 let
@@ -75,6 +76,8 @@ buildPythonPackage {
     which
   ];
 
+  buildInputs = [ pybind11 ];
+
   pythonRelaxDeps = [
     "black"
   ];