diff --git a/pkgs/development/python-modules/mediafile/default.nix b/pkgs/development/python-modules/mediafile/default.nix
index a3c2ad7794f..00a657800da 100644
--- a/pkgs/development/python-modules/mediafile/default.nix
+++ b/pkgs/development/python-modules/mediafile/default.nix
@@ -11,7 +11,7 @@
 buildPythonPackage rec {
   pname = "mediafile";
   version = "0.10.1";
-  format = "flit";
+  format = "pyproject";
 
   disabled = pythonOlder "3.6";