diff --git a/pkgs/development/python-modules/pyisy/default.nix b/pkgs/development/python-modules/pyisy/default.nix
index 30d2b6faa50f..210704420c69 100644
--- a/pkgs/development/python-modules/pyisy/default.nix
+++ b/pkgs/development/python-modules/pyisy/default.nix
@@ -5,23 +5,20 @@
   colorlog,
   fetchFromGitHub,
   python-dateutil,
-  pythonOlder,
   requests,
   setuptools-scm,
 }:
 
 buildPythonPackage rec {
   pname = "pyisy";
-  version = "3.1.14";
-  format = "setuptools";
-
-  disabled = pythonOlder "3.7";
+  version = "3.4.0";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "automicus";
     repo = "PyISY";
     tag = "v${version}";
-    hash = "sha256-OvWdKr8RlXRnAUMHSPhJDacvKeRa8QGPmGPQWLG2ouk=";
+    hash = "sha256-rXSkDG7AK8+r4x3ttk7GJw1hH+xLLVx0gTGK0PvQNfE=";
   };
 
   postPatch = ''
@@ -29,9 +26,9 @@ buildPythonPackage rec {
       --replace 'version_format="{tag}"' 'version="${version}"'
   '';
 
-  nativeBuildInputs = [ setuptools-scm ];
+  build-system = [ setuptools-scm ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     aiohttp
     colorlog
     python-dateutil
@@ -46,7 +43,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python module to talk to ISY994 from UDI";
     homepage = "https://github.com/automicus/PyISY";
-    changelog = "https://github.com/automicus/PyISY/releases/tag/v${version}";
+    changelog = "https://github.com/automicus/PyISY/releases/tag/${src.tag}";
     license = licenses.asl20;
     maintainers = with maintainers; [ dotlambda ];
   };