diff --git a/pkgs/development/python-modules/langchain-experimental/001-avoid-check-fullpath.patch b/pkgs/development/python-modules/langchain-experimental/001-avoid-check-fullpath.patch
deleted file mode 100644
index 9dd3284bd7c9..000000000000
--- a/pkgs/development/python-modules/langchain-experimental/001-avoid-check-fullpath.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/tests/unit_tests/test_bash.py b/tests/unit_tests/test_bash.py
-index ba7b0d0..cade19e 100644
---- a/tests/unit_tests/test_bash.py
-+++ b/tests/unit_tests/test_bash.py
-@@ -58,7 +58,7 @@ def test_incorrect_command_return_err_output() -> None:
-     session = BashProcess(return_err_output=True)
-     output = session.run(["invalid_command"])
-     assert re.match(
--        r"^/bin/sh:.*invalid_command.*(?:not found|Permission denied).*$", output
-+        r".*/bin/sh:.*invalid_command.*(?:not found|Permission denied).*$", output
-     )
- 
- 
diff --git a/pkgs/development/python-modules/langchain-experimental/default.nix b/pkgs/development/python-modules/langchain-experimental/default.nix
deleted file mode 100644
index da4d8d1a8729..000000000000
--- a/pkgs/development/python-modules/langchain-experimental/default.nix
+++ /dev/null
@@ -1,87 +0,0 @@
-{
-  lib,
-  buildPythonPackage,
-  fetchFromGitHub,
-  pythonAtLeast,
-
-  # build-system
-  pdm-backend,
-
-  # dependencies
-  langchain-core,
-  langchain-community,
-
-  # testing
-  langchain-tests,
-  pytestCheckHook,
-
-  # passthru
-  gitUpdater,
-}:
-
-buildPythonPackage rec {
-  pname = "langchain-experimental";
-  version = "0.4.1";
-  pyproject = true;
-
-  src = fetchFromGitHub {
-    owner = "langchain-ai";
-    repo = "langchain-experimental";
-    tag = "libs/experimental/v${version}";
-    hash = "sha256-3hz63DCoym2V4b6Wzi0eH+B8mvGu7pqRNj3Ltk04UTk=";
-  };
-
-  sourceRoot = "${src.name}/libs/experimental";
-
-  patches = [
-    # Remove it when https://github.com/langchain-ai/langchain-experimental/pull/58 is merged and released
-    ./001-avoid-check-fullpath.patch
-  ];
-
-  build-system = [
-    pdm-backend
-  ];
-
-  pythonRelaxDeps = [
-    # Each component release requests the exact latest core.
-    # That prevents us from updating individual components.
-    "langchain-core"
-    "langchain-community"
-  ];
-
-  dependencies = [
-    langchain-core
-    langchain-community
-  ];
-
-  nativeCheckInputs = [
-    langchain-tests
-    pytestCheckHook
-  ];
-
-  enabledTestPaths = [ "tests/unit_tests" ];
-
-  pythonImportsCheck = [ "langchain_experimental" ];
-
-  disabledTests = lib.optionals (pythonAtLeast "3.14") [
-    # AttributeError: module 'ast' has no attribute 'Str'
-    # https://github.com/langchain-ai/langchain-community/issues/492
-    "test_color_question_1"
-    "test_color_question_2"
-  ];
-
-  passthru.updateScript = gitUpdater {
-    rev-prefix = "libs/experimental/v";
-  };
-
-  meta = {
-    changelog = "https://github.com/langchain-ai/langchain-experimental/releases/tag/${src.tag}";
-    description = "Experimental features for LangChain";
-    homepage = "https://github.com/langchain-ai/langchain-experimental/tree/main/libs/experimental";
-    license = lib.licenses.mit;
-    maintainers = with lib.maintainers; [
-      mrdev023
-      sarahec
-    ];
-  };
-}
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 1ef2e779ed3e..6163988c63f0 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -303,6 +303,7 @@ mapAliases {
   keyrings-passwordstore = throw "keyrings-passwordstore has been removed because it has been marked as broken since at least November 2024."; # Added 2025-10-03
   kivy-garden-modernmenu = throw "kivy-garden-modernmenu has been removed as it's abandoned since 2019"; # added 2025-05-25
   konnected = throw "konnected has been removed, because the home-assistant integration that required it has been deprecated and removed. See https://support.konnected.io/migrating-from-konnected-legacy-home-assistant-integration-to-esphome."; # Added 2026-06-04
+  langchain-experimental = throw "'langchain-experimental' has been removed because the upstream repository was archived in 2026-05-26"; # Added 2026-05-27
   langchain-standard-tests = throw "'langchain-standard-tests' has been renamed to/replaced by 'langchain-tests'"; # Converted to throw 2025-10-29
   langchainplus-sdk = throw "'langchainplus-sdk' has been renamed to/replaced by 'langsmith'"; # Converted to throw 2025-10-29
   lazr_config = throw "'lazr_config' has been renamed to/replaced by 'lazr-config'"; # Converted to throw 2025-10-29
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 99e3fab63d9b..c7ec98cc2901 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8593,8 +8593,6 @@ self: super: with self; {
 
   langchain-deepseek = callPackage ../development/python-modules/langchain-deepseek { };
 
-  langchain-experimental = callPackage ../development/python-modules/langchain-experimental { };
-
   langchain-fireworks = callPackage ../development/python-modules/langchain-fireworks { };
 
   langchain-google-genai = callPackage ../development/python-modules/langchain-google-genai { };