From e6b482cc0bb9f7a72538f154b5572885a8146ede Mon Sep 17 00:00:00 2001
From: Andrew Marshall <andrew@johnandrewmarshall.com>
Date: Sun, 12 Jul 2026 17:45:24 -0400
Subject: [PATCH] python3Package.albumentations: fix build
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- pkg_resources is removed in setuptools 82 ([src][1])
- test_blur was failing with “ValueError: The truth value of an array
  with more than one element is ambiguous”; converting sigma to float
  (from `numpy.float64`) resolves, see also [this issue][2]

[1]: https://github.com/pypa/setuptools/blob/v82.0.0/NEWS.rst
[2]: https://github.com/python-pillow/Pillow/issues/8911
---
 .../python-modules/albumentations/default.nix         | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkgs/development/python-modules/albumentations/default.nix b/pkgs/development/python-modules/albumentations/default.nix
index 0cf23c5bf18e..623187c8e1ec 100644
--- a/pkgs/development/python-modules/albumentations/default.nix
+++ b/pkgs/development/python-modules/albumentations/default.nix
@@ -44,6 +44,17 @@ buildPythonPackage rec {
     ./dont-check-for-updates.patch
   ];
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace-fail \
+        'from pkg_resources import DistributionNotFound, get_distribution' \
+        'from importlib.metadata import PackageNotFoundError as DistributionNotFound, distribution as get_distribution'
+    substituteInPlace tests/test_blur.py \
+      --replace-fail \
+        '(ImageFilter.GaussianBlur(radius=sigma))' \
+        '(ImageFilter.GaussianBlur(radius=float(sigma)))'
+  '';
+
   pythonRelaxDeps = [ "opencv-python" ];
 
   build-system = [ setuptools ];