diff --git a/flake.nix b/flake.nix
index 1b358766..403a7f15 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,6 +25,7 @@
                 url = "https://github.com/9001/partftpy/releases/download/v0.4.0/partftpy-0.4.0.tar.gz";
                 hash = "sha256-5Q2zyuJ892PGZmb+YXg0ZPW/DK8RDL1uE0j5HPd4We0=";
               };
+              pyproject = true;
               pythonImportsCheck = [ "partftpy.TftpServer" ];
             };
           };