1 files changed, 8 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/python-crontab/default.nix b/nixpkgs/pkgs/development/python-modules/python-crontab/default.nix
index 99cf1c63ca8f..a1fb349c9ee9 100644
--- a/nixpkgs/pkgs/development/python-modules/python-crontab/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/python-crontab/default.nix
@@ -4,12 +4,13 @@
 , python-dateutil
 , pytestCheckHook
 , pythonOlder
+, setuptools
 }:
 
 buildPythonPackage rec {
   pname = "python-crontab";
   version = "3.0.0";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -18,6 +19,10 @@ buildPythonPackage rec {
     hash = "sha256-eft0ZQOd39T7k9By1u4NRcGsi/FZfwaG6hT9Q2Hbo3k=";
   };
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
   propagatedBuildInputs = [
     python-dateutil
   ];
@@ -30,6 +35,8 @@ buildPythonPackage rec {
     "test_07_non_posix_shell"
     # doctest that assumes /tmp is writeable, awkward to patch
     "test_03_usage"
+    # AssertionError: 4 != 0
+    "test_19_frequency_at_month"
   ];
 
   pythonImportsCheck = [