diff --git a/pkgs/development/python-modules/prox-tv/default.nix b/pkgs/development/python-modules/prox-tv/default.nix
index 1cc2ab89360f..1af942b92675 100644
--- a/pkgs/development/python-modules/prox-tv/default.nix
+++ b/pkgs/development/python-modules/prox-tv/default.nix
@@ -28,6 +28,8 @@ buildPythonPackage {
     cffi
   ];
 
+  propagatedNativeBuildInputs = [ cffi ];
+
   buildInputs = [ blas lapack ];
 
   enableParallelBuilding = true;