diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index f47b56e7409b..eed0b802b95e 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -391,6 +391,7 @@
   ./services/display-managers/greetd.nix
   ./services/editors/emacs.nix
   ./services/editors/infinoted.nix
+  ./services/finance/odoo.nix
   ./services/games/crossfire-server.nix
   ./services/games/deliantra-server.nix
   ./services/games/factorio.nix
diff --git a/nixos/modules/services/finance/odoo.nix b/nixos/modules/services/finance/odoo.nix
new file mode 100644
index 000000000000..3fcb2b3966a5
--- /dev/null
+++ b/nixos/modules/services/finance/odoo.nix
@@ -0,0 +1,122 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.odoo;
+  format = pkgs.formats.ini {};
+in
+{
+  options = {
+    services.odoo = {
+      enable = mkEnableOption "odoo";
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.odoo;
+        defaultText = literalExpression "pkgs.odoo";
+        description = "Odoo package to use.";
+      };
+
+      addons = mkOption {
+        type = with types; listOf package;
+        default = [];
+        example = literalExpression "[ pkgs.odoo_enterprise ]";
+        description = "Odoo addons";
+      };
+
+      settings = mkOption {
+        type = format.type;
+        default = {};
+        description = ''
+          Odoo configuration settings. For more details see https://www.odoo.com/documentation/15.0/administration/install/deploy.html
+        '';
+      };
+
+      domain = mkOption {
+        type = with types; nullOr str;
+        description = "Domain to host Odoo with nginx";
+        default = null;
+      };
+    };
+  };
+
+  config = mkIf (cfg.enable) (let
+    cfgFile = format.generate "odoo.cfg" cfg.settings;
+  in {
+    services.nginx = mkIf (cfg.domain != null) {
+      upstreams = {
+        odoo.servers = {
+          "127.0.0.1:8069" = {};
+        };
+
+        odoochat.servers = {
+          "127.0.0.1:8072" = {};
+        };
+      };
+
+      virtualHosts."${cfg.domain}" = {
+        extraConfig = ''
+          proxy_read_timeout 720s;
+          proxy_connect_timeout 720s;
+          proxy_send_timeout 720s;
+
+          proxy_set_header X-Forwarded-Host $host;
+          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+          proxy_set_header X-Forwarded-Proto $scheme;
+          proxy_set_header X-Real-IP $remote_addr;
+        '';
+
+        locations = {
+          "/longpolling" = {
+            proxyPass = "http://odoochat";
+          };
+
+          "/" = {
+            proxyPass = "http://odoo";
+            extraConfig = ''
+              proxy_redirect off;
+            '';
+          };
+        };
+      };
+    };
+
+    services.odoo.settings.options = {
+      proxy_mode = cfg.domain != null;
+    };
+
+    users.users.odoo = {
+      isSystemUser = true;
+      group = "odoo";
+    };
+    users.groups.odoo = {};
+
+    systemd.services.odoo = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" "postgresql.service" ];
+
+      # pg_dump
+      path = [ config.services.postgresql.package ];
+
+      requires = [ "postgresql.service" ];
+      script = "HOME=$STATE_DIRECTORY ${cfg.package}/bin/odoo ${optionalString (cfg.addons != []) "--addons-path=${concatMapStringsSep "," escapeShellArg cfg.addons}"} -c ${cfgFile}";
+
+      serviceConfig = {
+        DynamicUser = true;
+        User = "odoo";
+        StateDirectory = "odoo";
+      };
+    };
+
+    services.postgresql = {
+      enable = true;
+
+      ensureUsers = [{
+        name = "odoo";
+        ensurePermissions = { "DATABASE odoo" = "ALL PRIVILEGES"; };
+      }];
+      ensureDatabases = [ "odoo" ];
+    };
+  });
+}
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 5f919dbf7855..f4d6800aff60 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -172,6 +172,7 @@ in
   installed-tests = pkgs.recurseIntoAttrs (handleTest ./installed-tests {});
   invidious = handleTest ./invidious.nix {};
   oci-containers = handleTestOn ["x86_64-linux"] ./oci-containers.nix {};
+  odoo = handleTest ./odoo.nix {};
   # 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/nixos/tests/odoo.nix b/nixos/tests/odoo.nix
new file mode 100644
index 000000000000..96e3405482b4
--- /dev/null
+++ b/nixos/tests/odoo.nix
@@ -0,0 +1,27 @@
+import ./make-test-python.nix ({ pkgs, lib, ...} : with lib; {
+  name = "odoo";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ mkg20001 ];
+  };
+
+  nodes = {
+    server = { ... }: {
+      services.nginx = {
+        enable = true;
+        recommendedProxySettings = true;
+      };
+
+      services.odoo = {
+        enable = true;
+        domain = "localhost";
+      };
+    };
+  };
+
+  testScript = { nodes, ... }:
+  ''
+    server.wait_for_unit("odoo.service")
+    server.wait_until_succeeds("curl -s http://localhost:8069/web/database/selector | grep '<title>Odoo</title>'")
+    server.succeed("curl -s http://localhost/web/database/selector | grep '<title>Odoo</title>'")
+  '';
+})
diff --git a/pkgs/applications/finance/odoo/default.nix b/pkgs/applications/finance/odoo/default.nix
new file mode 100644
index 000000000000..aee699e85346
--- /dev/null
+++ b/pkgs/applications/finance/odoo/default.nix
@@ -0,0 +1,103 @@
+{ stdenv
+, lib
+, fetchurl
+, python3
+, python3Packages
+, wkhtmltopdf
+}:
+
+with python3Packages;
+
+/*
+
+TODO:
+  For languages with right-to-left interface (such as Arabic or Hebrew), the package rtlcss is needed:
+  $ sudo npm install -g rtlcss
+
+*/
+
+buildPythonApplication rec {
+  pname = "odoo";
+
+  major = "15";
+  minor = "0";
+  patch = "20211029";
+
+  version = "${major}.${minor}.${patch}";
+
+  # latest release is at https://github.com/odoo/docker/blob/master/15.0/Dockerfile
+  src = fetchurl {
+    url = "https://nightly.odoo.com/${major}.${minor}/nightly/src/odoo_${version}.tar.gz";
+    name = "${pname}-${version}";
+    sha256 = "sha256-/E+bLBbiz7fRyTwP+0AMpqbuRkOpE4B4P6kREIB4m1Q=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+    wheel
+    mock
+  ];
+
+  buildInputs = [
+    wkhtmltopdf
+  ];
+
+  # needs some investigation
+  doCheck = false;
+
+  makeWrapperArgs = [ "--prefix" "PATH" ":" "${wkhtmltopdf}/bin" ];
+
+  propagatedBuildInputs = [
+    Babel
+    chardet
+    decorator
+    docutils
+    ebaysdk
+    freezegun
+    gevent
+    greenlet
+    html2text
+    idna
+    jinja2
+    libsass
+    lxml
+    markupsafe
+    num2words
+    ofxparse
+    passlib
+    pillow
+    polib
+    psutil
+    psycopg2
+    pydot
+    pyopenssl
+    pypdf2
+    pyserial
+    python-dateutil
+    ldap
+    python-stdnum
+    pytz
+    pyusb
+    qrcode
+    reportlab
+    requests
+    vobject
+    werkzeug1
+    xlrd
+    XlsxWriter
+    xlwt
+    zeep
+  ];
+
+  unpackPhase = ''
+    tar xfz $src
+    cd odoo*
+  '';
+
+  meta = with lib; {
+    description = "Open Source ERP and CRM";
+    homepage = "https://www.odoo.com/";
+    license = licenses.lgpl3Only;
+    maintainers = [ maintainers.mkg20001 ];
+  };
+}
diff --git a/pkgs/development/node-packages/node-packages.json b/pkgs/development/node-packages/node-packages.json
index 22c53d348825..d71d1a230c19 100644
--- a/pkgs/development/node-packages/node-packages.json
+++ b/pkgs/development/node-packages/node-packages.json
@@ -232,6 +232,7 @@
 , "rimraf"
 , "rollup"
 , { "rust-analyzer-build-deps": "../../misc/vscode-extensions/rust-analyzer/build-deps" }
+, "rtlcss"
 , "s3http"
 , "sass"
 , "semver"
diff --git a/pkgs/development/python-modules/ebaysdk/default.nix b/pkgs/development/python-modules/ebaysdk/default.nix
new file mode 100644
index 000000000000..8c80ccd4c362
--- /dev/null
+++ b/pkgs/development/python-modules/ebaysdk/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, lxml
+, requests
+}:
+
+buildPythonPackage rec {
+  pname = "ebaysdk";
+  version = "2.2.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-Lrh11wa0gfWcqN0wdFON9+UZaBT5zhLQ74RpA0Opx/M=";
+  };
+
+  propagatedBuildInputs = [
+    lxml
+    requests
+  ];
+
+  # requires network
+  doCheck = false;
+
+  meta = with lib; {
+    description = "eBay SDK for Python";
+    homepage = "https://github.com/timotheus/ebaysdk-python";
+    license = licenses.cddl;
+    maintainers = [ maintainers.mkg20001 ];
+  };
+}
diff --git a/pkgs/development/python-modules/werkzeug/1.nix b/pkgs/development/python-modules/werkzeug/1.nix
index ae4df6ae939c..faa07b496237 100644
--- a/pkgs/development/python-modules/werkzeug/1.nix
+++ b/pkgs/development/python-modules/werkzeug/1.nix
@@ -17,6 +17,11 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ itsdangerous ];
   checkInputs = [ pytestCheckHook requests hypothesis pytest-timeout ];
 
+  postPatch = ''
+    # ResourceWarning causes tests to fail
+    rm tests/test_routing.py
+  '';
+
   disabledTests = [
     "test_save_to_pathlib_dst"
     "test_cookie_maxsize"
@@ -38,6 +43,9 @@ buildPythonPackage rec {
     # E   File "/nix/store/cwv8aj4vsqvimzljw5dxsxy663vjgibj-python3.9-Werkzeug-1.0.1/lib/python3.9/site-packages/werkzeug/formparser.py", line 318, in parse_multipart_headers
     # E     return Headers(result)
     # E ResourceWarning: unclosed file <_io.FileIO name=11 mode='rb+' closefd=True>
+    "test_basic_routing"
+    "test_merge_slashes_match"
+    "test_merge_slashes_build"
     "TestMultiPart"
     "TestHTTPUtility"
   ] ++ lib.optionals stdenv.isDarwin [
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d8c9eadd4974..da63d524c632 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3380,6 +3380,8 @@ with pkgs;
 
   obinskit = callPackage ../applications/misc/obinskit {};
 
+  odoo = callPackage ../applications/finance/odoo {};
+
   odafileconverter = libsForQt5.callPackage ../applications/graphics/odafileconverter {};
 
   ossutil = callPackage ../tools/admin/ossutil {};
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f447d82ffdb1..15ffe1f9f344 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2367,6 +2367,8 @@ in {
 
   easywatch = callPackage ../development/python-modules/easywatch { };
 
+  ebaysdk = callPackage ../development/python-modules/ebaysdk { };
+
   ec2instanceconnectcli = callPackage ../tools/virtualization/ec2instanceconnectcli { };
 
   eccodes = toPythonModule (pkgs.eccodes.override {
@@ -9815,6 +9817,8 @@ in {
 
   werkzeug = callPackage ../development/python-modules/werkzeug { };
 
+  werkzeug1 = callPackage ../development/python-modules/werkzeug/1.nix { };
+
   west = callPackage ../development/python-modules/west { };
 
   wfuzz = callPackage ../development/python-modules/wfuzz { };