diff --git a/pkgs/development/python-modules/ttp/default.nix b/pkgs/development/python-modules/ttp/default.nix
index a484ed9f76ac..afa66b288ab2 100644
--- a/pkgs/development/python-modules/ttp/default.nix
+++ b/pkgs/development/python-modules/ttp/default.nix
@@ -9,6 +9,7 @@
 , netmiko
 , openpyxl
 , pytestCheckHook
+, poetry-core
 , pyyaml
 , tabulate
 , ttp-templates
@@ -17,16 +18,20 @@
 
 buildPythonPackage rec {
   pname = "ttp";
-  version = "0.8.4";
-  format = "setuptools";
+  version = "0.9.1";
+  format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "dmulyalin";
     repo = pname;
-    rev = version;
-    hash = "sha256-vuKlddqm8KirqAJyvBPfRb5Nw9zo4Fl1bwbfVMhmH9g=";
+    rev = "refs/tags/${version}";
+    hash = "sha256-FhuIYXktcNnOVX+KU5cDOd2Qk7AcWaSKvfB/BZYpsZo=";
   };
 
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
   propagatedBuildInputs = [
     # https://github.com/dmulyalin/ttp/blob/master/docs/source/Installation.rst#additional-dependencies
     cerberus
@@ -87,6 +92,8 @@ buildPythonPackage rec {
     "test_child_group_do_not_start_if_no_parent_started"
     # Assertion Error
     "test_in_threads_parsing"
+    # missing env var
+    "test_ttp_templates_dir_env_variable"
   ];
 
   pytestFlagsArray = [