diff --git a/doc/release-notes/rl-2511.section.md b/doc/release-notes/rl-2511.section.md
index 871d0168cd7e..53dc4b58f519 100644
--- a/doc/release-notes/rl-2511.section.md
+++ b/doc/release-notes/rl-2511.section.md
@@ -266,6 +266,8 @@
 
 - The main binary of `tomlq` has been renamed from `tomlq` to `tq`.
 
+- `odoo16` has been dropped due to end of support by upstream, consider upgrading supported version.
+
 - `opensoldat` binaries and user configuration directory names have been prefixed by 'open', becoming opensoldat and opensoldatserver. Configuration will be moved automatically before launch when possible.
 
 - `emacs-macport` has been moved to a fork of Mitsuharu Yamamoto's patched source code starting with Emacs v30 as the original project seems to be currently dormant. All older versions of this package have been dropped.
diff --git a/pkgs/by-name/od/odoo16/fix-test.patch b/pkgs/by-name/od/odoo16/fix-test.patch
deleted file mode 100644
index 232590c87c30..000000000000
--- a/pkgs/by-name/od/odoo16/fix-test.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-diff --git a/odoo/http.py b/odoo/http.py
-index f26dd52db235c..9689fc894b2b1 100644
---- a/odoo/http.py
-+++ b/odoo/http.py
-@@ -117,6 +117,7 @@
- import glob
- import hashlib
- import hmac
-+import importlib.metadata
- import inspect
- import json
- import logging
-@@ -256,7 +257,7 @@ def get_default_session():
-     'alias', 'host', 'methods',
- }
- 
--if parse_version(werkzeug.__version__) >= parse_version('2.0.2'):
-+if parse_version(importlib.metadata.version('werkzeug')) >= parse_version('2.0.2'):
-     # Werkzeug 2.0.2 adds the websocket option. If a websocket request
-     # (ws/wss) is trying to access an HTTP route, a WebsocketMismatch
-     # exception is raised. On the other hand, Werkzeug 0.16 does not
-
diff --git a/pkgs/by-name/od/odoo16/package.nix b/pkgs/by-name/od/odoo16/package.nix
deleted file mode 100644
index 6e95a6909def..000000000000
--- a/pkgs/by-name/od/odoo16/package.nix
+++ /dev/null
@@ -1,105 +0,0 @@
-{
-  lib,
-  fetchzip,
-  python311,
-  rtlcss,
-  wkhtmltopdf,
-  nixosTests,
-}:
-
-let
-  odoo_version = "16.0";
-  odoo_release = "20250506";
-  python = python311.override {
-    self = python;
-  };
-in
-python.pkgs.buildPythonApplication rec {
-  pname = "odoo";
-  version = "${odoo_version}.${odoo_release}";
-
-  format = "setuptools";
-
-  # latest release is at https://github.com/odoo/docker/blob/master/16.0/Dockerfile
-  src = fetchzip {
-    url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
-    name = "odoo-${version}";
-    hash = "sha256-dBqRZ3cf4/udP9hm+u9zhuUCkH176uG2NPAy5sujyNc="; # odoo
-  };
-
-  patches = [ ./fix-test.patch ];
-
-  makeWrapperArgs = [
-    "--prefix"
-    "PATH"
-    ":"
-    "${lib.makeBinPath [
-      wkhtmltopdf
-      rtlcss
-    ]}"
-  ];
-
-  propagatedBuildInputs = with python.pkgs; [
-    babel
-    chardet
-    cryptography
-    decorator
-    docutils
-    ebaysdk
-    freezegun
-    gevent
-    greenlet
-    idna
-    jinja2
-    libsass
-    lxml
-    lxml-html-clean
-    markupsafe
-    num2words
-    ofxparse
-    passlib
-    pillow
-    polib
-    psutil
-    psycopg2
-    pydot
-    pyopenssl
-    pypdf2
-    pyserial
-    python-dateutil
-    python-ldap
-    python-stdnum
-    pytz
-    pyusb
-    qrcode
-    reportlab
-    requests
-    urllib3
-    vobject
-    werkzeug
-    xlrd
-    xlsxwriter
-    xlwt
-    zeep
-
-    setuptools
-    mock
-  ];
-
-  # takes 5+ minutes and there are not files to strip
-  dontStrip = true;
-
-  passthru = {
-    updateScript = ./update.sh;
-    tests = {
-      inherit (nixosTests) odoo16;
-    };
-  };
-
-  meta = {
-    description = "Open Source ERP and CRM";
-    homepage = "https://www.odoo.com/";
-    license = lib.licenses.lgpl3Only;
-    maintainers = with lib.maintainers; [ mkg20001 ];
-  };
-}
diff --git a/pkgs/by-name/od/odoo16/update.sh b/pkgs/by-name/od/odoo16/update.sh
deleted file mode 100755
index 2265f9048c0e..000000000000
--- a/pkgs/by-name/od/odoo16/update.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash -p curl gnused nix coreutils nix-prefetch
-# shellcheck shell=bash
-
-set -euo pipefail
-
-SCRIPT_DIR="$(dirname "${BASH_SOURCE[0]}")"
-PKG=$(basename "$SCRIPT_DIR")
-
-LATEST="18" # increment manually
-VERSION="${PKG/#odoo}"
-VERSION="${VERSION:-$LATEST}.0"
-
-RELEASE="$(
-    curl "https://nightly.odoo.com/$VERSION/nightly/src/" |
-        sed -nE 's/.*odoo_'"$VERSION"'.(20[0-9]{6}).tar.gz.*/\1/p' |
-        tail -n 1
-)"
-
-latestVersion="$VERSION.$RELEASE"
-currentVersion=$(nix-instantiate --eval -E "with import ./. {}; $PKG.version or (lib.getVersion $PKG)" | tr -d '"')
-
-if [[ "$currentVersion" == "$latestVersion" ]]; then
-    echo "$PKG is up-to-date: $currentVersion"
-    exit 0
-fi
-
-cd "$SCRIPT_DIR"
-
-sed -ri "s| hash.+ # odoo| hash = \"$(nix-prefetch -q fetchzip --option extra-experimental-features flakes --url "https://nightly.odoo.com/${VERSION}/nightly/src/odoo_${latestVersion}.zip")\"; # odoo|g" package.nix
-sed -ri "s|odoo_version = .+|odoo_version = \"$VERSION\";|" package.nix
-sed -ri "s|odoo_release = .+|odoo_release = \"$RELEASE\";|" package.nix