diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index de5a4a91a32..0f7c4c44ff1 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2229,6 +2229,9 @@ in {
       url = "mirror://pypi/b/buttersink/${name}.tar.gz";
     };
 
+    # Python 2 syntax
+    disabled = isPy3k;
+
     meta = {
       description = "Synchronise btrfs snapshots";
       longDescription = ''