diff --git a/pkgs/development/python-modules/sortedcollections/default.nix b/pkgs/development/python-modules/sortedcollections/default.nix
index a42e79df4d1..b8261d88628 100644
--- a/pkgs/development/python-modules/sortedcollections/default.nix
+++ b/pkgs/development/python-modules/sortedcollections/default.nix
@@ -13,9 +13,9 @@ buildPythonPackage rec {
     sha256 = "12nkw69lnyvh9wy6rsd0ng4bcia81vkhj1rj1kj1k3vzppn0sgmr";
   };
 
-  buildInputs = [ sortedcontainers ];
+  propagatedBuildInputs = [ sortedcontainers ];
 
-  # wants to test all python versions with tox:
+  # No tests in PyPi tarball
   doCheck = false;
 
   meta = with stdenv.lib; {