diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 0d89d6bd8d76..14bb5158a2dd 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -143,7 +143,9 @@ in {
 
   breathe = callPackage ../development/python-modules/breathe { };
 
-  browsermob-proxy = callPackage ../development/python-modules/browsermob-proxy {};
+  browsermob-proxy = if ! isPy3k then
+    callPackage ../development/python-modules/browsermob-proxy {}
+  else throw "browsermob-proxy is not supported for ${python.executable}";
 
   bugseverywhere = callPackage ../applications/version-management/bugseverywhere {};