diff --git a/pkgs/development/python-modules/pytest-docker-tools/default.nix b/pkgs/development/python-modules/pytest-docker-tools/default.nix
index 309db021c297..4462dde07535 100644
--- a/pkgs/development/python-modules/pytest-docker-tools/default.nix
+++ b/pkgs/development/python-modules/pytest-docker-tools/default.nix
@@ -3,37 +3,27 @@
   buildPythonPackage,
   docker,
   fetchFromGitHub,
-  fetchpatch,
-  poetry-core,
   pytest,
   pytestCheckHook,
   pythonOlder,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "pytest-docker-tools";
-  version = "3.1.3";
+  version = "3.1.9";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "Jc2k";
     repo = "pytest-docker-tools";
-    tag = version;
-    hash = "sha256-6F3aSUyDlBBYG1kwOQvey7rujDdK83uJ3Q1dr8Uo1pw=";
+    tag = "v${version}";
+    hash = "sha256-WYfgO7Ch1hCj9cE43jgI+2JEwDOzNvuMtkVV3PdMiBs=";
   };
 
-  patches = [
-    # Switch to poetry-core, https://github.com/Jc2k/pytest-docker-tools/pull/48
-    (fetchpatch {
-      name = "switch-poetry-core.patch";
-      url = "https://github.com/Jc2k/pytest-docker-tools/pull/48/commits/a655e4a32b075e06e89dd907b06bc4ad90703988.patch";
-      hash = "sha256-CwCBld7p+bqBfxV9IyxcCvfxXfnUSzCLF2m0ZduIqkU=";
-    })
-  ];
-
-  build-system = [ poetry-core ];
+  build-system = [ setuptools ];
 
   buildInputs = [ pytest ];