diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 53128c6bb2a..3dd07824c15 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -68,6 +68,10 @@ pythonPackages = modules // rec {
 
   nixpart = callPackage ../tools/filesystems/nixpart { };
 
+  # This is used for NixOps to make sure we won't break it with the next major
+  # version of nixpart.
+  nixpart0 = nixpart;
+
   pil = import ../development/python-modules/pil {
     inherit (pkgs) fetchurl stdenv libjpeg zlib freetype;
     inherit python buildPythonPackage;