diff --git a/pkgs/development/python-modules/binaryornot/default.nix b/pkgs/development/python-modules/binaryornot/default.nix
index 5cc150c6fa7f..496ffc574703 100644
--- a/pkgs/development/python-modules/binaryornot/default.nix
+++ b/pkgs/development/python-modules/binaryornot/default.nix
@@ -2,33 +2,40 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   chardet,
   hypothesis,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "binaryornot";
   version = "0.4.4";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "359501dfc9d40632edc9fac890e19542db1a287bbcfa58175b66658392018061";
+    inherit (finalAttrs) pname version;
+    hash = "sha256-NZUB38nUBjLtyfrIkOGVQtsaKHu8+lgXW2Zlg5IBgGE=";
   };
 
+  build-system = [ setuptools ];
+
   prePatch = ''
     # TypeError: binary() got an unexpected keyword argument 'average_size'
     substituteInPlace tests/test_check.py \
-      --replace "average_size=512" ""
+      --replace-fail "average_size=512" ""
   '';
 
-  propagatedBuildInputs = [ chardet ];
+  dependencies = [ chardet ];
 
   nativeCheckInputs = [ hypothesis ];
 
+  pythonImportsCheck = [ "binaryornot" ];
+
   meta = {
     homepage = "https://github.com/audreyr/binaryornot";
     description = "Ultra-lightweight pure Python package to check if a file is binary or text";
     license = lib.licenses.bsd3;
   };
-}
+})