diff --git a/pkgs/development/python-modules/binaryornot/default.nix b/pkgs/development/python-modules/binaryornot/default.nix
index 5cc150c6fa7f..be3650b7ccb4 100644
--- a/pkgs/development/python-modules/binaryornot/default.nix
+++ b/pkgs/development/python-modules/binaryornot/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   chardet,
   hypothesis,
 }:
@@ -9,20 +10,22 @@
 buildPythonPackage rec {
   pname = "binaryornot";
   version = "0.4.4";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "359501dfc9d40632edc9fac890e19542db1a287bbcfa58175b66658392018061";
   };
 
+  build-system = [ setuptools ];
+
   prePatch = ''
     # TypeError: binary() got an unexpected keyword argument 'average_size'
     substituteInPlace tests/test_check.py \
       --replace "average_size=512" ""
   '';
 
-  propagatedBuildInputs = [ chardet ];
+  dependencies = [ chardet ];
 
   nativeCheckInputs = [ hypothesis ];