diff --git a/pkgs/development/python-modules/us/default.nix b/pkgs/development/python-modules/us/default.nix
index d6d2b53731c7..b80106ab493c 100644
--- a/pkgs/development/python-modules/us/default.nix
+++ b/pkgs/development/python-modules/us/default.nix
@@ -6,12 +6,15 @@
   pytestCheckHook,
   pythonOlder,
   pytz,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "us";
   version = "3.2.0";
-  format = "setuptools";
+  pyproject = true;
+
+  build-system = [ setuptools ];
 
   disabled = pythonOlder "3.6";
 
@@ -20,13 +23,9 @@ buildPythonPackage rec {
     hash = "sha256-yyI+hTk9zFFx6tDdISutxH+WZ7I3AP6j5+pfMQ1UUzg=";
   };
 
-  postPatch = ''
-    # Upstream spins jellyfish
-    substituteInPlace setup.py \
-      --replace "jellyfish==" "jellyfish>="
-  '';
-
-  propagatedBuildInputs = [ jellyfish ];
+  propagatedBuildInputs = [
+    jellyfish
+  ];
 
   nativeCheckInputs = [
     pytestCheckHook
@@ -35,7 +34,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "us" ];
 
-  meta = with lib; {
+  meta = {
     description = "Package for easily working with US and state metadata";
     mainProgram = "states";
     longDescription = ''
@@ -45,7 +44,7 @@ buildPythonPackage rec {
       census, congressional districts, counties, and census tracts.
     '';
     homepage = "https://github.com/unitedstates/python-us/";
-    license = licenses.bsd3;
+    license = lib.licenses.bsd3;
     maintainers = [ ];
   };
 }