diff --git a/pkgs/development/python-modules/formulae/default.nix b/pkgs/development/python-modules/formulae/default.nix
index c08e987a7b65..b8c28b464746 100644
--- a/pkgs/development/python-modules/formulae/default.nix
+++ b/pkgs/development/python-modules/formulae/default.nix
@@ -1,7 +1,6 @@
 {
   lib,
   buildPythonPackage,
-  pythonOlder,
   fetchFromGitHub,
   setuptools,
   setuptools-scm,
@@ -14,9 +13,7 @@
 buildPythonPackage rec {
   pname = "formulae";
   version = "0.5.4";
-  format = "pyproject";
-
-  disabled = pythonOlder "3.7";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "bambinos";
@@ -25,23 +22,27 @@ buildPythonPackage rec {
     hash = "sha256-SSyQa7soIp+wSXX5wek9LG95q7J7K34mztzx01lPiWo=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     setuptools
     setuptools-scm
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     numpy
     pandas
     scipy
   ];
 
   nativeCheckInputs = [ pytestCheckHook ];
-  # use assertions of form `assert pytest.approx(...)`, which is now disallowed:
+
   disabledTests = [
+    # use assertions of form `assert pytest.approx(...)`, which is now disallowed:
     "test_basic"
     "test_degree"
+    # AssertionError
+    "test_evalenv_equality"
   ];
+
   pythonImportsCheck = [
     "formulae"
     "formulae.matrices"
@@ -50,7 +51,7 @@ buildPythonPackage rec {
   meta = with lib; {
     homepage = "https://bambinos.github.io/formulae";
     description = "Formulas for mixed-effects models in Python";
-    changelog = "https://github.com/bambinos/formulae/releases/tag/${version}";
+    changelog = "https://github.com/bambinos/formulae/releases/tag/${src.tag}";
     license = licenses.mit;
     maintainers = with maintainers; [ bcdarwin ];
   };