diff --git a/pkgs/development/python-modules/bbox/default.nix b/pkgs/development/python-modules/bbox/default.nix
index 0a41bccf7111..7c7dd2527375 100644
--- a/pkgs/development/python-modules/bbox/default.nix
+++ b/pkgs/development/python-modules/bbox/default.nix
@@ -29,6 +29,11 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ poetry-core ];
 
+  postPatch = ''
+    substituteInPlace bbox/metrics.py \
+      --replace-warn round_ round
+  '';
+
   propagatedBuildInputs = [
     pyquaternion
     numpy
@@ -46,6 +51,8 @@ buildPythonPackage rec {
     "test_multi_jaccard_index_2d_performance"
   ];
 
+  pythonRelaxDeps = [ "numpy" ];
+
   pythonImportsCheck = [ "bbox" ];
 
   meta = with lib; {