diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 06213b9ce7c6..b5c46f2fb16a 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -619,7 +619,6 @@ in
   odoo = handleTest ./odoo.nix { };
   odoo17 = handleTest ./odoo.nix { package = pkgs.odoo17; };
   odoo16 = handleTest ./odoo.nix { package = pkgs.odoo16; };
-  odoo15 = handleTest ./odoo.nix { package = pkgs.odoo15; };
   # 9pnet_virtio used to mount /nix partition doesn't support
   # hibernation. This test happens to work on x86_64-linux but
   # not on other platforms.
diff --git a/pkgs/by-name/od/odoo/package.nix b/pkgs/by-name/od/odoo/package.nix
index 254459e62081..ceef961f1fd8 100644
--- a/pkgs/by-name/od/odoo/package.nix
+++ b/pkgs/by-name/od/odoo/package.nix
@@ -9,7 +9,7 @@
 
 let
   odoo_version = "18.0";
-  odoo_release = "20250213";
+  odoo_release = "20250506";
   python = python312.override {
     self = python;
   };
@@ -24,7 +24,7 @@ python.pkgs.buildPythonApplication rec {
     # find latest version on https://nightly.odoo.com/${odoo_version}/nightly/src
     url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
     name = "odoo-${version}";
-    hash = "sha256-iohlJ5OQ10iUaWjC4AFYmBwXuf9OOXAdCgdhdJAchYQ="; # odoo
+    hash = "sha256-rNG0He+51DnRT5g1SovGZ9uiE1HWXtcmAybcadBMjY4="; # odoo
   };
 
   makeWrapperArgs = [
@@ -97,11 +97,11 @@ python.pkgs.buildPythonApplication rec {
     };
   };
 
-  meta = with lib; {
+  meta = {
     description = "Open Source ERP and CRM";
     homepage = "https://www.odoo.com/";
-    license = licenses.lgpl3Only;
-    maintainers = with maintainers; [
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [
       mkg20001
       siriobalmelli
     ];
diff --git a/pkgs/by-name/od/odoo15/package.nix b/pkgs/by-name/od/odoo15/package.nix
deleted file mode 100644
index c149bf1ee2bb..000000000000
--- a/pkgs/by-name/od/odoo15/package.nix
+++ /dev/null
@@ -1,119 +0,0 @@
-{
-  lib,
-  fetchFromGitHub,
-  fetchzip,
-  python310,
-  rtlcss,
-  wkhtmltopdf,
-  nixosTests,
-}:
-
-let
-  odoo_version = "15.0";
-  odoo_release = "20241010";
-  python = python310.override {
-    self = python;
-    packageOverrides = self: super: {
-      pypdf2 = super.pypdf2.overridePythonAttrs (old: rec {
-        version = "1.28.6";
-
-        src = fetchFromGitHub {
-          owner = "py-pdf";
-          repo = "pypdf";
-          rev = version;
-          fetchSubmodules = true;
-          hash = "sha256-WnRbsy/PJcotZqY9mJPLadrYqkXykOVifLIbDyNf4s4=";
-        };
-
-        dependencies = [ self.setuptools ];
-
-        nativeCheckInputs = with self; [
-          pytestCheckHook
-          pillow
-        ];
-      });
-    };
-  };
-in
-python.pkgs.buildPythonApplication rec {
-  pname = "odoo";
-  version = "${odoo_version}.${odoo_release}";
-
-  format = "setuptools";
-
-  # latest release is at https://github.com/odoo/docker/blob/5fb6a842747c296099d9384587cd89640eb7a615/15.0/Dockerfile#L58
-  src = fetchzip {
-    url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
-    name = "odoo-${version}";
-    hash = "sha256-Hkre6mghEiLrDwfB1BxGbqEm/zruHLwaS+eIFQKjl1o="; # odoo
-  };
-
-  makeWrapperArgs = [
-    "--prefix"
-    "PATH"
-    ":"
-    "${lib.makeBinPath [
-      wkhtmltopdf
-      rtlcss
-    ]}"
-  ];
-
-  propagatedBuildInputs = with python.pkgs; [
-    babel
-    chardet
-    decorator
-    docutils
-    ebaysdk
-    freezegun
-    gevent
-    greenlet
-    idna
-    jinja2
-    libsass
-    lxml
-    lxml-html-clean
-    markupsafe
-    mock
-    num2words
-    ofxparse
-    passlib
-    pillow
-    polib
-    psutil
-    psycopg2
-    pydot
-    pyopenssl
-    pypdf2
-    pyserial
-    python-dateutil
-    python-ldap
-    python-stdnum
-    pytz
-    pyusb
-    qrcode
-    reportlab
-    requests
-    setuptools
-    vobject
-    werkzeug
-    xlrd
-    xlsxwriter
-    xlwt
-    zeep
-  ];
-
-  # takes 5+ minutes and there are not files to strip
-  dontStrip = true;
-
-  passthru = {
-    updateScript = ./update.sh;
-    tests = { inherit (nixosTests) odoo15; };
-  };
-
-  meta = with lib; {
-    description = "Open Source ERP and CRM";
-    homepage = "https://www.odoo.com/";
-    license = licenses.lgpl3Only;
-    maintainers = with maintainers; [ mkg20001 ];
-  };
-}
diff --git a/pkgs/by-name/od/odoo15/update.sh b/pkgs/by-name/od/odoo15/update.sh
deleted file mode 100755
index 2265f9048c0e..000000000000
--- a/pkgs/by-name/od/odoo15/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
diff --git a/pkgs/by-name/od/odoo16/fix-test.patch b/pkgs/by-name/od/odoo16/fix-test.patch
new file mode 100644
index 000000000000..232590c87c30
--- /dev/null
+++ b/pkgs/by-name/od/odoo16/fix-test.patch
@@ -0,0 +1,22 @@
+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
index 73791dbcfcf1..6e95a6909def 100644
--- a/pkgs/by-name/od/odoo16/package.nix
+++ b/pkgs/by-name/od/odoo16/package.nix
@@ -1,7 +1,7 @@
 {
   lib,
   fetchzip,
-  python310,
+  python311,
   rtlcss,
   wkhtmltopdf,
   nixosTests,
@@ -9,8 +9,8 @@
 
 let
   odoo_version = "16.0";
-  odoo_release = "20241010";
-  python = python310.override {
+  odoo_release = "20250506";
+  python = python311.override {
     self = python;
   };
 in
@@ -24,9 +24,11 @@ python.pkgs.buildPythonApplication rec {
   src = fetchzip {
     url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
     name = "odoo-${version}";
-    hash = "sha256-ICe5UOy+Ga81fE66SnIhRz3+JEEbGfoz7ag53mkG4UM="; # odoo
+    hash = "sha256-dBqRZ3cf4/udP9hm+u9zhuUCkH176uG2NPAy5sujyNc="; # odoo
   };
 
+  patches = [ ./fix-test.patch ];
+
   makeWrapperArgs = [
     "--prefix"
     "PATH"
@@ -90,14 +92,14 @@ python.pkgs.buildPythonApplication rec {
   passthru = {
     updateScript = ./update.sh;
     tests = {
-      inherit (nixosTests) odoo;
+      inherit (nixosTests) odoo16;
     };
   };
 
-  meta = with lib; {
+  meta = {
     description = "Open Source ERP and CRM";
     homepage = "https://www.odoo.com/";
-    license = licenses.lgpl3Only;
-    maintainers = with maintainers; [ mkg20001 ];
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [ mkg20001 ];
   };
 }
diff --git a/pkgs/by-name/od/odoo17/package.nix b/pkgs/by-name/od/odoo17/package.nix
index 698afb37d103..ac5db5d4ff76 100644
--- a/pkgs/by-name/od/odoo17/package.nix
+++ b/pkgs/by-name/od/odoo17/package.nix
@@ -2,7 +2,8 @@
   lib,
   fetchgit,
   fetchzip,
-  python310,
+  fetchpatch2,
+  python311,
   rtlcss,
   wkhtmltopdf,
   nixosTests,
@@ -10,8 +11,8 @@
 
 let
   odoo_version = "17.0";
-  odoo_release = "20241010";
-  python = python310.override {
+  odoo_release = "20250506";
+  python = python311.override {
     self = python;
     packageOverrides = final: prev: {
       # requirements.txt fixes docutils at 0.17; the default 0.21.1 tested throws exceptions
@@ -37,8 +38,14 @@ python.pkgs.buildPythonApplication rec {
   src = fetchzip {
     url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
     name = "odoo-${version}";
-    hash = "sha256-s4Fvzjwl2oM0V9G1WQdSoqo7kE7b8tJdluk9f7A06e8="; # odoo
+    hash = "sha256-V15Oe3AOBJ1agt5WmpFZnC7EkyoKyxTH8Iqdf2/9aec="; # odoo
   };
+  patches = [
+    (fetchpatch2 {
+      url = "https://github.com/odoo/odoo/commit/ade3200e8138a9c28eb9b294a4efd2753a8e5591.patch?full_index=1";
+      hash = "sha256-EFKjrR38eg9bxlNmRNoLSXem+MjQKqPcR3/mSgs0cDs=";
+    })
+  ];
 
   makeWrapperArgs = [
     "--prefix"
@@ -105,15 +112,15 @@ python.pkgs.buildPythonApplication rec {
   passthru = {
     updateScript = ./update.sh;
     tests = {
-      inherit (nixosTests) odoo;
+      inherit (nixosTests) odoo17;
     };
   };
 
-  meta = with lib; {
+  meta = {
     description = "Open Source ERP and CRM";
     homepage = "https://www.odoo.com/";
-    license = licenses.lgpl3Only;
-    maintainers = with maintainers; [
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [
       mkg20001
       siriobalmelli
     ];
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 5e6ee7707b97..ca3b4c3a7efe 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1332,6 +1332,7 @@ mapAliases {
   oathToolkit = oath-toolkit; # Added 2022-04-04
   oauth2_proxy = throw "'oauth2_proxy' has been renamed to/replaced by 'oauth2-proxy'"; # Converted to throw 2024-10-17
   ocis-bin = throw "ocis-bin has been renamed to ocis_5-bin'. Future major.minor versions will be made available as separate packages"; # Added 2025-03-30
+  odoo15 = throw "odoo15 has been removed from nixpkgs as it is unsupported; migrate to a newer version of odoo"; # Added 2025-05-06
   oil = lib.warnOnInstantiate "Oil has been replaced with the faster native C++ version and renamed to 'oils-for-unix'. See also https://github.com/oils-for-unix/oils/wiki/Oils-Deployments" oils-for-unix; # Added 2024-10-22
   onevpl-intel-gpu = lib.warnOnInstantiate "onevpl-intel-gpu has been renamed to vpl-gpu-rt" vpl-gpu-rt; # Added 2024-06-04
   openai-whisper-cpp = whisper-cpp; # Added 2024-12-13