diff --git a/pkgs/development/python-modules/pytest-isort/default.nix b/pkgs/development/python-modules/pytest-isort/default.nix
index c06959b96c4..234742f2e6d 100644
--- a/pkgs/development/python-modules/pytest-isort/default.nix
+++ b/pkgs/development/python-modules/pytest-isort/default.nix
@@ -1,26 +1,64 @@
-{ lib, buildPythonPackage, fetchPypi, isPy27, mock, pytest, isort }:
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, fetchpatch
+, importlib-metadata
+, isort
+, poetry-core
+, pytest
+, pytestCheckHook
+, pythonOlder
+}:
 
 buildPythonPackage rec {
   pname = "pytest-isort";
   version = "3.0.0";
+  format = "pyproject";
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-T+Sybq0q93ZzDsI/WHDXQh81qs4ipBxOk4WG702Hh8s=";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "stephrdev";
+    repo = pname;
+    rev = version;
+    hash = "sha256-gbEO3HBDeZ+nUACzpeV6iVuCdNHS5956wFzIYkbam+M=";
   };
 
-  propagatedBuildInputs = [ isort ];
+  nativeBuildInputs = [
+    poetry-core
+  ];
 
-  checkInputs = [ pytest ]
-    ++ lib.optionals isPy27 [ mock ];
+  buildInputs = [
+    pytest
+  ];
 
-  checkPhase = ''
-    py.test -vs --cache-clear
-  '';
+  propagatedBuildInputs = [
+    isort
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  patches = [
+    # Can be removed with the next release, https://github.com/stephrdev/pytest-isort/pull/44
+    (fetchpatch {
+      name = "switch-to-poetry-core.patch";
+      url = "https://github.com/stephrdev/pytest-isort/commit/f17ed2d294ae90e415d051e1c720982e3dd01bff.patch";
+      sha256 = "sha256-PiOs0c61BNx/tZN11DYblOd7tNzGthNnlkmYMTI9v18=";
+    })
+  ];
+
+  pythonImportsCheck = [
+    "pytest_isort"
+  ];
 
   meta = with lib; {
     description = "Pytest plugin to perform isort checks (import ordering)";
     homepage = "https://github.com/moccu/pytest-isort/";
     license = licenses.bsd3;
+    maintainers = with maintainers; [ ];
   };
 }