diff --git a/pkgs/development/python-modules/btrees/default.nix b/pkgs/development/python-modules/btrees/default.nix
index 8cd4e2cdc0fc..5ed0b31e52b8 100644
--- a/pkgs/development/python-modules/btrees/default.nix
+++ b/pkgs/development/python-modules/btrees/default.nix
@@ -6,15 +6,19 @@
 , transaction
 , zope_testrunner
 , python
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "BTrees";
   version = "4.10.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-1qsONBDQdNcVQkXW3GSTrobxtQvWCA0TEOuz7N6l3rY=";
+    hash = "sha256-1qsONBDQdNcVQkXW3GSTrobxtQvWCA0TEOuz7N6l3rY=";
   };
 
   propagatedBuildInputs = [