From e5228f3b4bc79fea354e759217f9f6369d7a78ab Mon Sep 17 00:00:00 2001
From: Timo Gottszky <timogottszky+git@gmail.com>
Date: Thu, 25 Jun 2026 14:31:34 +0200
Subject: [PATCH 1/4] python3Packages.dpcontracts: enable __structuredAttrs

---
 pkgs/development/python-modules/dpcontracts/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/python-modules/dpcontracts/default.nix b/pkgs/development/python-modules/dpcontracts/default.nix
index 1917a264a114..33ee4cff9675 100644
--- a/pkgs/development/python-modules/dpcontracts/default.nix
+++ b/pkgs/development/python-modules/dpcontracts/default.nix
@@ -9,6 +9,8 @@ buildPythonPackage {
   version = "unstable-2018-11-20";
   format = "setuptools";
 
+  __structuredAttrs = true;
+
   src = fetchFromGitHub {
     owner = "deadpixi";
     repo = "contracts";

From 6e409a04d47d3dcd8f6ecfb0b9fbaadd1c36f057 Mon Sep 17 00:00:00 2001
From: Timo Gottszky <timogottszky+git@gmail.com>
Date: Thu, 25 Jun 2026 14:33:30 +0200
Subject: [PATCH 2/4] python3Packages.dpcontracts: migrate to pyproject

---
 pkgs/development/python-modules/dpcontracts/default.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/dpcontracts/default.nix b/pkgs/development/python-modules/dpcontracts/default.nix
index 33ee4cff9675..e11f41ebb77f 100644
--- a/pkgs/development/python-modules/dpcontracts/default.nix
+++ b/pkgs/development/python-modules/dpcontracts/default.nix
@@ -2,12 +2,13 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
 }:
 
 buildPythonPackage {
   pname = "dpcontracts";
   version = "unstable-2018-11-20";
-  format = "setuptools";
+  pyproject = true;
 
   __structuredAttrs = true;
 
@@ -18,6 +19,10 @@ buildPythonPackage {
     hash = "sha256-FygJPXo7lZ9tlfqY6KmPJ3PLIilMGLBr3013uj9hCEs=";
   };
 
+  build-system = [
+    setuptools
+  ];
+
   # package does not have any tests
   doCheck = false;
 

From 4204175122a053e92d4d83549dddcf044015cb0b Mon Sep 17 00:00:00 2001
From: Timo Gottszky <timogottszky+git@gmail.com>
Date: Fri, 3 Jul 2026 15:20:26 +0200
Subject: [PATCH 3/4] python3Packages.dpcontracts: enable tests

---
 .../python-modules/dpcontracts/default.nix     | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/python-modules/dpcontracts/default.nix b/pkgs/development/python-modules/dpcontracts/default.nix
index e11f41ebb77f..6844f28ebf13 100644
--- a/pkgs/development/python-modules/dpcontracts/default.nix
+++ b/pkgs/development/python-modules/dpcontracts/default.nix
@@ -3,6 +3,7 @@
   buildPythonPackage,
   fetchFromGitHub,
   setuptools,
+  pytestCheckHook,
 }:
 
 buildPythonPackage {
@@ -19,12 +20,25 @@ buildPythonPackage {
     hash = "sha256-FygJPXo7lZ9tlfqY6KmPJ3PLIilMGLBr3013uj9hCEs=";
   };
 
+  # Replacements in README.rst are necessary to check it with doctest
+  postPatch = ''
+    substituteInPlace README.rst \
+      --replace-fail " PreconditionError" " dpcontracts.PreconditionError" \
+      --replace-fail " PostconditionError" " dpcontracts.PostconditionError" \
+      --replace-fail ">>> class Counter:" $'>>> from dpcontracts import preserve\n    >>> class Counter:'
+  '';
+
   build-system = [
     setuptools
   ];
 
-  # package does not have any tests
-  doCheck = false;
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  enabledTestPaths = [
+    "README.rst"
+  ];
 
   pythonImportsCheck = [ "dpcontracts" ];
 

From e73b7d657ebdcc531ccbe11366462889cc673939 Mon Sep 17 00:00:00 2001
From: Timo Gottszky <timogottszky+git@gmail.com>
Date: Fri, 3 Jul 2026 15:48:14 +0200
Subject: [PATCH 4/4] python3Packages.dpcontracts: fix version

---
 pkgs/development/python-modules/dpcontracts/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/dpcontracts/default.nix b/pkgs/development/python-modules/dpcontracts/default.nix
index 6844f28ebf13..15bf0d2fee3f 100644
--- a/pkgs/development/python-modules/dpcontracts/default.nix
+++ b/pkgs/development/python-modules/dpcontracts/default.nix
@@ -8,7 +8,7 @@
 
 buildPythonPackage {
   pname = "dpcontracts";
-  version = "unstable-2018-11-20";
+  version = "0.6.0-unstable-2018-11-20";
   pyproject = true;
 
   __structuredAttrs = true;