diff --git a/pkgs/tools/networking/s3cmd/git.nix b/pkgs/tools/networking/s3cmd/git.nix
index a7d43a470f81..6193137c8d41 100644
--- a/pkgs/tools/networking/s3cmd/git.nix
+++ b/pkgs/tools/networking/s3cmd/git.nix
@@ -9,7 +9,7 @@ pythonPackages.buildPythonPackage rec {
     sha256 = "13jqw19ws5my8r856j1p7xydwpyp8agnzxkjv6pa7h72wl7rz90i";
   };
 
-  buildInputs = with pythonPackages; [ dateutil ];
+  propagatedBuildInputs = with pythonPackages; [ dateutil ];
 
   meta = with stdenv.lib;  {
     description = "Command line tool for managing Amazon S3 and CloudFront services";