diff --git a/pkgs/development/python-modules/lsassy/default.nix b/pkgs/development/python-modules/lsassy/default.nix
index dea8c8d194aa..9ab583acbeeb 100644
--- a/pkgs/development/python-modules/lsassy/default.nix
+++ b/pkgs/development/python-modules/lsassy/default.nix
@@ -3,26 +3,42 @@
 , fetchFromGitHub
 , impacket
 , netaddr
-, pythonOlder
+, poetry-core
 , pypykatz
+, pythonOlder
+, pythonRelaxDepsHook
 , rich
 }:
 
 buildPythonPackage rec {
   pname = "lsassy";
   version = "3.1.9";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "Hackndo";
-    repo = pname;
+    repo = "lsassy";
     rev = "refs/tags/v${version}";
     hash = "sha256-VGLSVv/+UpgeSTHoOTjEfQSAYfXA3bAI+yKjcKBI1Z4=";
   };
 
-  propagatedBuildInputs = [
+  pythonRelaxDeps = [
+    "impacket"
+    "netaddr"
+    "rich"
+  ];
+
+  nativeBuildInputs = [
+    pythonRelaxDepsHook
+  ];
+
+  build-system = [
+    poetry-core
+  ];
+
+  dependencies = [
     impacket
     netaddr
     pypykatz
@@ -38,10 +54,10 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Python module to extract data from Local Security Authority Subsystem Service (LSASS)";
-    mainProgram = "lsassy";
     homepage = "https://github.com/Hackndo/lsassy";
     changelog = "https://github.com/Hackndo/lsassy/releases/tag/v${version}";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
+    mainProgram = "lsassy";
   };
 }