diff --git a/pkgs/development/python-modules/tappy/default.nix b/pkgs/development/python-modules/tappy/default.nix
index 5c464707f2cc6..332848bafb446 100644
--- a/pkgs/development/python-modules/tappy/default.nix
+++ b/pkgs/development/python-modules/tappy/default.nix
@@ -3,18 +3,33 @@
   buildPythonPackage,
   pythonOlder,
   fetchPypi,
+  setuptools,
+  pyyaml,
+  more-itertools,
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "tap.py";
   version = "3.1";
+  pyproject = true;
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3c0cd45212ad5a25b35445964e2517efa000a118a1bfc3437dae828892eaf1e1";
+    hash = "sha256-PAzUUhKtWiWzVEWWTiUX76AAoRihv8NDfa6CiJLq8eE=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  optional-dependencies = {
+    yaml = [
+      pyyaml
+      more-itertools
+    ];
   };
 
   nativeCheckInputs = [ pytestCheckHook ];
@@ -25,6 +40,7 @@ buildPythonPackage rec {
     description = "A set of tools for working with the Test Anything Protocol (TAP) in Python";
     homepage = "https://github.com/python-tap/tappy";
     changelog = "https://tappy.readthedocs.io/en/latest/releases.html";
+    mainProgram = "tappy";
     license = licenses.bsd2;
     maintainers = with maintainers; [ sfrijters ];
   };