diff --git a/pkgs/development/python-modules/python-lsp-black/default.nix b/pkgs/development/python-modules/python-lsp-black/default.nix
index e129a26a5f2f..573f400a4bd7 100644
--- a/pkgs/development/python-modules/python-lsp-black/default.nix
+++ b/pkgs/development/python-modules/python-lsp-black/default.nix
@@ -1,7 +1,6 @@
 {
   lib,
   buildPythonPackage,
-  pythonOlder,
   fetchFromGitHub,
   black,
   fetchpatch,
@@ -11,10 +10,10 @@
 
   # dependencies
   python-lsp-server,
-  tomli,
 
   # checks
   pytestCheckHook,
+  setuptools_80,
 }:
 
 buildPythonPackage rec {
@@ -29,19 +28,23 @@ buildPythonPackage rec {
     hash = "sha256-nV6mePSWzfPW2RwXg/mxgzfT9wD95mmTuPnPEro1kEY=";
   };
 
-  patches =
-    /**
-      includes a series of patches fixing tests not yet released as 2.0.1+ version
-       they are meant to keep up to date with black releases
-    */
-    lib.optional (lib.versionAtLeast black.version "24.2.0") (fetchpatch {
+  patches = [
+    # includes a series of patches fixing tests not yet released as 2.0.1+ version
+    # they are meant to keep up to date with black releases
+    (fetchpatch {
       url = "https://github.com/python-lsp/python-lsp-black/commit/d43b41431379f9c9bb05fab158c4d97e6d515f8f.patch";
       hash = "sha256-38bYU27+xtA8Kq3appXTkNnkG5/XgrUJ2nQ5+yuSU2U=";
     })
-    ++ lib.optional (lib.versionAtLeast black.version "24.3.0") (fetchpatch {
+    (fetchpatch {
       url = "https://github.com/python-lsp/python-lsp-black/commit/9298585a9d14d25920c33b188d79e820dc98d4a9.patch";
       hash = "sha256-4u0VIS7eidVEiKRW2wc8lJVkJwhzJD/M+uuqmTtiZ7E=";
-    });
+    })
+    # https://github.com/python-lsp/python-lsp-black/pull/65 (black >= 26.5)
+    (fetchpatch {
+      url = "https://github.com/python-lsp/python-lsp-black/commit/35b5bc6f944bddac0c896127dc44a9404e95f482.patch";
+      hash = "sha256-FRxM8leFVkPjRiR3wNjy5g5BazHc6ZvtnoI8Qgz4co4=";
+    })
+  ];
 
   build-system = [ setuptools ];
 
@@ -52,7 +55,10 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "pylsp_black" ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [
+    pytestCheckHook
+    setuptools_80 # for pkg_resources, removed in setuptools 81+ (tests/test_plugin.py)
+  ];
 
   meta = {
     homepage = "https://github.com/python-lsp/python-lsp-black";