diff --git a/pkgs/development/python-modules/quantities/default.nix b/pkgs/development/python-modules/quantities/default.nix
index 1c0a223c9c3a..8ed59a545f79 100644
--- a/pkgs/development/python-modules/quantities/default.nix
+++ b/pkgs/development/python-modules/quantities/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  fetchpatch2,
   numpy,
   pytestCheckHook,
   pythonOlder,
@@ -23,6 +24,14 @@ buildPythonPackage rec {
     hash = "sha256-N20xfzGtM0VnfkJtzMytNLySTkgVz2xf1nEJxlwBSCI=";
   };
 
+  patches = [
+    (fetchpatch2 {
+      name = "prevent-arbitrary-code-eval.patch";
+      url = "https://github.com/python-quantities/python-quantities/pull/236.patch";
+      hash = "sha256-H1tOfXqNMIKY01m6o2PsfZG0CvnWNxW2qIWA5ce1lRk=";
+    })
+  ];
+
   build-system = [
     setuptools
     setuptools-scm