diff --git a/nixos/doc/manual/release-notes/rl-2505.section.md b/nixos/doc/manual/release-notes/rl-2505.section.md
index ac019ce754e4..595f86be13c0 100644
--- a/nixos/doc/manual/release-notes/rl-2505.section.md
+++ b/nixos/doc/manual/release-notes/rl-2505.section.md
@@ -186,6 +186,11 @@
 - Cinnamon has been updated to 6.4, please check the [upstream announcement](https://www.linuxmint.com/rel_xia_whatsnew.php) for more details.
   - Following [changes in Mint 22](https://github.com/linuxmint/mintupgrade/commit/f239cde908288b8c250f938e7311c7ffbc16bd59) we are no longer overriding Qt application styles. You can still restore the previous default with `qt.style = "gtk2"` and `qt.platformTheme = "gtk2"`.
 
+- Xfce has been updated to 4.20, please check the [upstream feature tour](https://www.xfce.org/about/tour420) for more details.
+  - Wayland session is still [experimental](https://wiki.xfce.org/releng/wayland_roadmap) and requires opt-in using `enableWaylandSession` option.
+  - Overriding Wayland compositor is possible using `enableWaylandSession` option, but you might need to take care [`xfce4-session`](https://gitlab.xfce.org/xfce/xfce4-session/-/merge_requests/49), [`dbus-update-activation-environment`](https://github.com/labwc/labwc/blob/eaf11face68ee1f1bcc7ce1498304ca8c108c8ba/src/config/session.c#L234) and [`systemctl --user import-environment`](https://github.com/labwc/labwc/blob/eaf11face68ee1f1bcc7ce1498304ca8c108c8ba/src/config/session.c#L239) on startup.
+  - For new Xfce installations, default panel layout has [changed](https://gitlab.xfce.org/xfce/xfce4-panel/-/merge_requests/158/diffs) to not include external panel plugins by default. You can still add them yourself using the "Panel Preferences" dialog.
+
 - `networking.wireguard` now has an optional networkd backend. It is enabled by default when `networking.useNetworkd` is enabled, and it can be enabled alongside scripted networking with `networking.wireguard.useNetworkd`. Some `networking.wireguard` options have slightly different behavior with the networkd and script-based backends, documented in each option.
 
 - `services.avahi.ipv6` now defaults to true.
diff --git a/nixos/modules/services/x11/desktop-managers/xfce.nix b/nixos/modules/services/x11/desktop-managers/xfce.nix
index 8810b5f8c8b0..81f51e315ad8 100644
--- a/nixos/modules/services/x11/desktop-managers/xfce.nix
+++ b/nixos/modules/services/x11/desktop-managers/xfce.nix
@@ -69,6 +69,22 @@ in
         default = true;
         description = "Enable the XFCE screensaver.";
       };
+
+      enableWaylandSession = mkEnableOption "the experimental Xfce Wayland session";
+
+      waylandSessionCompositor = mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "wayfire";
+        description = ''
+          Command line to run a Wayland compositor, defaults to `labwc --startup`
+          if not specified. Note that `xfce4-session` will be passed to it as an
+          argument, see `startxfce4 --help` for details.
+
+          Some compositors do not have an option equivalent to labwc's `--startup`
+          and you might have to add xfce4-session somewhere in their configurations.
+        '';
+      };
     };
 
     environment.xfce.excludePackages = mkOption {
@@ -134,6 +150,8 @@ in
     programs.gnupg.agent.pinentryPackage = mkDefault pkgs.pinentry-gtk2;
     programs.xfconf.enable = true;
     programs.thunar.enable = true;
+    programs.labwc.enable = mkDefault (cfg.enableWaylandSession && (
+      cfg.waylandSessionCompositor == "" || lib.substring 0 5 cfg.waylandSessionCompositor == "labwc"));
 
     environment.pathsToLink = [
       "/share/xfce4"
@@ -144,6 +162,7 @@ in
 
     services.xserver.desktopManager.session = [{
       name = "xfce";
+      prettyName = "Xfce Session";
       desktopNames = [ "XFCE" ];
       bgSupport = !cfg.noDesktop;
       start = ''
@@ -152,6 +171,22 @@ in
       '';
     }];
 
+    # Copied from https://gitlab.xfce.org/xfce/xfce4-session/-/blob/xfce4-session-4.19.2/xfce-wayland.desktop.in
+    # to maintain consistent l10n state with X11 session file and to support the waylandSessionCompositor option.
+    services.displayManager.sessionPackages = optionals cfg.enableWaylandSession [
+      ((pkgs.writeTextDir "share/wayland-sessions/xfce-wayland.desktop" ''
+        [Desktop Entry]
+        Version=1.0
+        Name=Xfce Session (Wayland)
+        Comment=Use this session to run Xfce as your desktop environment
+        Exec=startxfce4 --wayland ${cfg.waylandSessionCompositor}
+        Icon=
+        Type=Application
+        DesktopNames=XFCE
+        Keywords=xfce;wayland;desktop;environment;session;
+      '').overrideAttrs (_: { passthru.providedSessions = [ "xfce-wayland" ]; }))
+    ];
+
     services.xserver.updateDbusEnvironment = true;
     programs.gdk-pixbuf.modulePackages = [ pkgs.librsvg ];
 
diff --git a/nixos/modules/services/x11/display-managers/default.nix b/nixos/modules/services/x11/display-managers/default.nix
index 87331a6658d3..7b8c8a661c95 100644
--- a/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixos/modules/services/x11/display-managers/default.nix
@@ -279,6 +279,11 @@ in
             lib.mapCartesianProduct
             ({dm, wm}: let
               sessionName = "${dm.name}${optionalString (wm.name != "none") ("+" + wm.name)}";
+              prettyName =
+                if dm.name != "none" then
+                  "${dm.prettyName or dm.name}${optionalString (wm.name != "none") (" (" + (wm.prettyName or wm.name) + ")")}"
+                else
+                  (wm.prettyName or wm.name);
               script = xsession dm wm;
               desktopNames = if dm ? desktopNames
                              then lib.concatStringsSep ";" dm.desktopNames
@@ -297,7 +302,7 @@ in
                     Type=XSession
                     TryExec=${script}
                     Exec=${script}
-                    Name=${sessionName}
+                    Name=${prettyName}
                     DesktopNames=${desktopNames}
                   '';
                 } // {
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 74d98935e54d..db89304691f8 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -1164,6 +1164,7 @@ in {
   xandikos = handleTest ./xandikos.nix {};
   xautolock = handleTest ./xautolock.nix {};
   xfce = handleTest ./xfce.nix {};
+  xfce-wayland = handleTest ./xfce-wayland.nix {};
   xmonad = handleTest ./xmonad.nix {};
   xmonad-xdg-autostart = handleTest ./xmonad-xdg-autostart.nix {};
   xpadneo = handleTest ./xpadneo.nix {};
diff --git a/nixos/tests/xfce-wayland.nix b/nixos/tests/xfce-wayland.nix
new file mode 100644
index 000000000000..5f835528c851
--- /dev/null
+++ b/nixos/tests/xfce-wayland.nix
@@ -0,0 +1,73 @@
+import ./make-test-python.nix (
+  { pkgs, ... }:
+  {
+    name = "xfce-wayland";
+
+    nodes.machine =
+      { pkgs, ... }:
+
+      {
+        imports = [
+          ./common/user-account.nix
+        ];
+
+        services.xserver.enable = true;
+        services.xserver.displayManager.lightdm.enable = true;
+        services.displayManager = {
+          defaultSession = "xfce-wayland";
+          autoLogin = {
+            enable = true;
+            user = "alice";
+          };
+        };
+
+        services.xserver.desktopManager.xfce.enable = true;
+        services.xserver.desktopManager.xfce.enableWaylandSession = true;
+        # https://gitlab.xfce.org/apps/xfce4-screensaver/-/merge_requests/28
+        services.xserver.desktopManager.xfce.enableScreensaver = false;
+        environment.systemPackages = [ pkgs.wlrctl ];
+      };
+
+    enableOCR = true;
+
+    testScript =
+      { nodes, ... }:
+      let
+        user = nodes.machine.users.users.alice;
+        rtdir = "XDG_RUNTIME_DIR=/run/user/${toString user.uid}";
+      in
+      ''
+        machine.wait_for_unit("display-manager.service")
+
+        with subtest("Wait for Wayland server"):
+          machine.wait_for_file("/run/user/${toString user.uid}/wayland-0")
+
+        with subtest("Check that logging in has given the user ownership of devices"):
+          machine.succeed("getfacl -p /dev/snd/timer | grep -q ${user.name}")
+
+        with subtest("Check if Xfce components actually start"):
+          for p in ["labwc", "xfdesktop", "xfce4-notifyd", "xfconfd", "xfce4-panel"]:
+            machine.wait_until_succeeds(f"pgrep {p}")
+
+        with subtest("Open Xfce terminal"):
+          machine.succeed("su - ${user.name} -c '${rtdir} xfce4-terminal >&2 &'")
+          machine.wait_until_succeeds("su - ${user.name} -c '${rtdir} wlrctl toplevel list | grep xfce4-terminal'")
+
+        with subtest("Open Thunar"):
+          machine.succeed("su - ${user.name} -c '${rtdir} thunar >&2 &'")
+          machine.wait_until_succeeds("su - ${user.name} -c '${rtdir} wlrctl toplevel list | grep Thunar'")
+          machine.wait_for_text('(Pictures|Public|Templates|Videos)')
+
+        with subtest("Check if various environment variables are set"):
+          cmd = "xargs --null --max-args=1 echo < /proc/$(pgrep -xf xfce4-panel)/environ"
+          machine.succeed(f"{cmd} | grep 'XDG_SESSION_TYPE' | grep 'wayland'")
+          machine.succeed(f"{cmd} | grep 'XFCE4_SESSION_COMPOSITOR' | grep 'labwc'")
+          machine.succeed(f"{cmd} | grep 'XDG_CURRENT_DESKTOP' | grep 'XFCE'")
+
+        with subtest("Check if any coredumps are found"):
+          machine.succeed("(coredumpctl --json=short 2>&1 || true) | grep 'No coredumps found'")
+          machine.sleep(10)
+          machine.screenshot("screen")
+      '';
+  }
+)
diff --git a/pkgs/applications/display-managers/lightdm/gtk-greeter.nix b/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
index 8bf003d37194..77e26c1777f5 100644
--- a/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
+++ b/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
@@ -45,6 +45,11 @@ stdenv.mkDerivation rec {
     "--sbindir=${placeholder "out"}/bin" # for wrapGAppsHook3 to wrap automatically
   ];
 
+  postPatch = ''
+    # https://github.com/Xubuntu/lightdm-gtk-greeter/pull/178
+    cp data/badges/xfce{,-wayland}_badge-symbolic.svg
+  '';
+
   preConfigure = ''
     configureFlagsArray+=( --enable-at-spi-command="${at-spi2-core}/libexec/at-spi-bus-launcher --launch-immediately" )
   '';
diff --git a/pkgs/by-name/bu/budgie-desktop/package.nix b/pkgs/by-name/bu/budgie-desktop/package.nix
index 74d9d2c35a94..eb4627dc504e 100644
--- a/pkgs/by-name/bu/budgie-desktop/package.nix
+++ b/pkgs/by-name/bu/budgie-desktop/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   accountsservice,
   alsa-lib,
   budgie-screensaver,
@@ -60,7 +61,16 @@ stdenv.mkDerivation (finalAttrs: {
     "man"
   ];
 
-  patches = [ ./plugins.patch ];
+  patches = [
+    ./plugins.patch
+
+    # Adapt to libxfce4windowing v4.19.8
+    # https://github.com/BuddiesOfBudgie/budgie-desktop/pull/627
+    (fetchpatch {
+      url = "https://github.com/BuddiesOfBudgie/budgie-desktop/commit/ba8170b4f3108f9de28331b6a98a9d92bb0ed4de.patch";
+      hash = "sha256-T//1/NmaV81j0jiIYK7vEp8sgKCgF2i10D+Rk9qAAeE=";
+    })
+  ];
 
   nativeBuildInputs = [
     docbook-xsl-nons
diff --git a/pkgs/by-name/gr/greybird/package.nix b/pkgs/by-name/gr/greybird/package.nix
index 0462a28d34fb..e78d49eff4de 100644
--- a/pkgs/by-name/gr/greybird/package.nix
+++ b/pkgs/by-name/gr/greybird/package.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchpatch
 , meson
 , ninja
 , pkg-config
@@ -22,6 +23,15 @@ stdenv.mkDerivation rec {
     sha256 = "+MZQ3FThuRFEfoARsF09B7POwytS5RgTs9zYzIHVtfg=";
   };
 
+  patches = [
+    # Fix label styles for xfdesktop 4.19
+    # https://github.com/shimmerproject/Greybird/pull/338
+    (fetchpatch {
+      url = "https://github.com/shimmerproject/Greybird/commit/7e4507d7713b2aaf41f8cfef2a1a9e214a4d8b6f.patch";
+      hash = "sha256-awXM2RgFIK/Ik5cJSy4IQYl+ic+XGQV0YwbL3SPclzQ=";
+    })
+  ];
+
   nativeBuildInputs = [
     meson
     ninja
diff --git a/pkgs/desktops/xfce/core/exo/default.nix b/pkgs/desktops/xfce/core/exo/default.nix
index e5d34969d4c8..8567100f076b 100644
--- a/pkgs/desktops/xfce/core/exo/default.nix
+++ b/pkgs/desktops/xfce/core/exo/default.nix
@@ -4,9 +4,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "exo";
-  version = "4.18.0";
+  version = "4.20.0";
 
-  sha256 = "sha256-oWlKeUD1v2qqb8vY+2Cu9VJ1iThFPVboP12m/ob5KSQ=";
+  sha256 = "sha256-mlGsFaKy96eEAYgYYqtEI4naq5ZSEe3V7nsWGAEucn0=";
 
   nativeBuildInputs = [
     libxslt
@@ -18,13 +18,9 @@ mkXfceDerivation {
     glib
     libxfce4ui
     libxfce4util
-
     (perl.withPackages(ps: with ps; [ URI ])) # for $out/lib/xfce4/exo/exo-compose-mail
   ];
 
-  # Workaround https://bugzilla.xfce.org/show_bug.cgi?id=15825
-  env.NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
-
   meta = with lib; {
     description = "Application library for Xfce";
     maintainers = with maintainers; [ ] ++ teams.xfce.members;
diff --git a/pkgs/desktops/xfce/core/garcon/default.nix b/pkgs/desktops/xfce/core/garcon/default.nix
index ec0d76bfe7ff..6f40696c3d44 100644
--- a/pkgs/desktops/xfce/core/garcon/default.nix
+++ b/pkgs/desktops/xfce/core/garcon/default.nix
@@ -3,9 +3,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "garcon";
-  version = "4.18.2";
+  version = "4.20.0";
 
-  sha256 = "sha256-J9f9MzZ1I9XIyvwuyINkvXDuXY6/MkjlH2Ct4yaEXsY=";
+  sha256 = "sha256-MeZkDb2QgGMaloO6Nwlj9JmZByepd6ERqpAWqrVv1xw=";
 
   nativeBuildInputs = [ gobject-introspection ];
 
diff --git a/pkgs/desktops/xfce/core/libxfce4ui/default.nix b/pkgs/desktops/xfce/core/libxfce4ui/default.nix
index 862d4f8cbc94..780c3ca990f8 100644
--- a/pkgs/desktops/xfce/core/libxfce4ui/default.nix
+++ b/pkgs/desktops/xfce/core/libxfce4ui/default.nix
@@ -1,16 +1,45 @@
-{ lib, mkXfceDerivation, gobject-introspection, vala, gtk3, libICE, libSM
-, libstartup_notification, libgtop, libepoxy, libxfce4util, xfconf }:
+{
+  mkXfceDerivation,
+  lib,
+  gobject-introspection,
+  vala,
+  libICE,
+  libSM,
+  libepoxy,
+  libgtop,
+  libgudev,
+  libstartup_notification,
+  xfconf,
+  gtk3,
+  libxfce4util,
+}:
 
 mkXfceDerivation {
   category = "xfce";
   pname = "libxfce4ui";
-  version = "4.18.6";
+  version = "4.20.0";
 
-  sha256 = "sha256-ojmI745tKLHv26uL1qS/v6hAcLmAV/WF2NAtAhQRUkg=";
+  sha256 = "sha256-M+OapPHQ/WxlkUzHPx+ELstVyGoZanCxCL0N8hDWSN8=";
 
-  nativeBuildInputs = [ gobject-introspection vala ];
-  buildInputs =  [ gtk3 libstartup_notification libgtop libepoxy xfconf ];
-  propagatedBuildInputs = [ libxfce4util libICE libSM ];
+  nativeBuildInputs = [
+    gobject-introspection
+    vala
+  ];
+
+  buildInputs = [
+    libICE
+    libSM
+    libepoxy
+    libgtop
+    libgudev
+    libstartup_notification
+    xfconf
+  ];
+
+  propagatedBuildInputs = [
+    gtk3
+    libxfce4util
+  ];
 
   configureFlags = [
     "--with-vendor-info=NixOS"
@@ -19,7 +48,10 @@ mkXfceDerivation {
   meta = with lib; {
     description = "Widgets library for Xfce";
     mainProgram = "xfce4-about";
-    license = with licenses; [ lgpl2Plus lgpl21Plus ];
+    license = with licenses; [
+      lgpl2Plus
+      lgpl21Plus
+    ];
     maintainers = with maintainers; [ ] ++ teams.xfce.members;
   };
 }
diff --git a/pkgs/desktops/xfce/core/libxfce4util/default.nix b/pkgs/desktops/xfce/core/libxfce4util/default.nix
index 02a4b98309a3..d2486d2fd256 100644
--- a/pkgs/desktops/xfce/core/libxfce4util/default.nix
+++ b/pkgs/desktops/xfce/core/libxfce4util/default.nix
@@ -1,13 +1,26 @@
-{ lib, mkXfceDerivation, gobject-introspection, vala }:
+{
+  mkXfceDerivation,
+  lib,
+  gobject-introspection,
+  vala,
+  glib,
+}:
 
 mkXfceDerivation {
   category = "xfce";
   pname = "libxfce4util";
-  version = "4.18.2";
+  version = "4.20.0";
 
-  sha256 = "sha256-JQ6biE1gxtB6+LWxRGfbUhgJhhITGhLr+8BxFW4/8SU=";
+  sha256 = "sha256-0qbJSCXHsVz3XILHICFhciyz92LgMZiR7XFLAESHRGQ=";
 
-  nativeBuildInputs = [ gobject-introspection vala ];
+  nativeBuildInputs = [
+    gobject-introspection
+    vala
+  ];
+
+  propagatedBuildInputs = [
+    glib
+  ];
 
   meta = with lib; {
     description = "Extension library for Xfce";
diff --git a/pkgs/desktops/xfce/core/libxfce4windowing/default.nix b/pkgs/desktops/xfce/core/libxfce4windowing/default.nix
index c83cf06d4384..8dddaf866637 100644
--- a/pkgs/desktops/xfce/core/libxfce4windowing/default.nix
+++ b/pkgs/desktops/xfce/core/libxfce4windowing/default.nix
@@ -4,18 +4,21 @@
 , wayland-scanner
 , glib
 , gtk3
+, libdisplay-info
 , libwnck
 , libX11
+, libXrandr
 , wayland
+, wayland-protocols
 , wlr-protocols
 }:
 
 mkXfceDerivation {
   category = "xfce";
   pname = "libxfce4windowing";
-  version = "4.19.3";
+  version = "4.20.0";
 
-  sha256 = "sha256-nsobRyGeagUq1WHzYBq6vd9g5A65KEQC4cX+m7w0pqg=";
+  sha256 = "sha256-t/GbsGipc0Ts2tZJaDJBuDF+9XMp8+Trq78NPAuHEpU=";
 
   nativeBuildInputs = [
     gobject-introspection
@@ -25,9 +28,12 @@ mkXfceDerivation {
   buildInputs = [
     glib
     gtk3
+    libdisplay-info
     libwnck
     libX11
+    libXrandr
     wayland
+    wayland-protocols
     wlr-protocols
   ];
 
diff --git a/pkgs/desktops/xfce/core/thunar-volman/default.nix b/pkgs/desktops/xfce/core/thunar-volman/default.nix
index 33b34e5beee8..ec2f37f31cec 100644
--- a/pkgs/desktops/xfce/core/thunar-volman/default.nix
+++ b/pkgs/desktops/xfce/core/thunar-volman/default.nix
@@ -3,11 +3,11 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "thunar-volman";
-  version = "4.18.0";
+  version = "4.20.0";
 
   buildInputs = [ exo gtk3 libgudev libxfce4ui libxfce4util xfconf ];
 
-  sha256 = "sha256-NRVoakU8jTCJVe+iyJQwW1xPti2vjd/8n8CYrIYGII0=";
+  sha256 = "sha256-XIVs/vRwy3QJQW/U7eLBvGdzplWlhdxn3f1lyTQsmpE=";
 
   odd-unstable = false;
 
diff --git a/pkgs/desktops/xfce/core/thunar/default.nix b/pkgs/desktops/xfce/core/thunar/default.nix
index e7c5c30089c2..74318b3622d3 100644
--- a/pkgs/desktops/xfce/core/thunar/default.nix
+++ b/pkgs/desktops/xfce/core/thunar/default.nix
@@ -23,9 +23,9 @@
 let unwrapped = mkXfceDerivation {
   category = "xfce";
   pname = "thunar";
-  version = "4.18.11";
+  version = "4.20.0";
 
-  sha256 = "sha256-B417gkrU9EG4ZsEdeuH8P2v4FqYUiTwqgKcO4cSi4SI=";
+  sha256 = "sha256-TCroFesFD0IKGdfuootd1BwEsWVECE2XQfUovJqPEh0=";
 
   nativeBuildInputs = [
     docbook_xsl
diff --git a/pkgs/desktops/xfce/core/tumbler/default.nix b/pkgs/desktops/xfce/core/tumbler/default.nix
index fd0e375033c0..98c94858be2b 100644
--- a/pkgs/desktops/xfce/core/tumbler/default.nix
+++ b/pkgs/desktops/xfce/core/tumbler/default.nix
@@ -19,9 +19,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "tumbler";
-  version = "4.18.2";
+  version = "4.20.0";
 
-  sha256 = "sha256-thioE0q2qnV4weJFPz8OWoHIRuUcXnQEviwBtCWsSV4=";
+  sha256 = "sha256-GmEMdG8Ikd4Tq/1ntCHiN0S7ehUXqzMX7OtXsycLd6E=";
 
   buildInputs = [
     libxfce4util
diff --git a/pkgs/desktops/xfce/core/xfce4-appfinder/default.nix b/pkgs/desktops/xfce/core/xfce4-appfinder/default.nix
index e716fab959a0..da32f4cda098 100644
--- a/pkgs/desktops/xfce/core/xfce4-appfinder/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-appfinder/default.nix
@@ -3,9 +3,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-appfinder";
-  version = "4.18.1";
+  version = "4.20.0";
 
-  sha256 = "sha256-CZEX1PzFsVt72Fkb4+5PiZjAcDisvYnbzFGFXjFL4sc=";
+  sha256 = "sha256-HovQnkfv5BOsRPowgMkMEWQmESkivVK0Xb7I15ZaOMc=";
 
   nativeBuildInputs = [ exo ];
   buildInputs = [ garcon gtk3 libxfce4ui libxfce4util xfconf ];
diff --git a/pkgs/desktops/xfce/core/xfce4-dev-tools/default.nix b/pkgs/desktops/xfce/core/xfce4-dev-tools/default.nix
index 7504c8e09d4c..f2a8e6fcd1ee 100644
--- a/pkgs/desktops/xfce/core/xfce4-dev-tools/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-dev-tools/default.nix
@@ -1,27 +1,48 @@
-{ lib
-, mkXfceDerivation
-, autoreconfHook
-, libxslt
-, docbook_xsl
-, autoconf
-, automake
-, glib
-, gtk-doc
-, intltool
-, libtool
+{
+  stdenv,
+  lib,
+  fetchFromGitLab,
+  autoreconfHook,
+  docbook_xsl,
+  libxslt,
+  meson,
+  pkg-config,
+  wrapGAppsHook3,
+  python3,
+  autoconf,
+  automake,
+  glib,
+  gtk-doc,
+  libtool,
+  intltool,
+  gitUpdater,
 }:
 
-mkXfceDerivation {
-  category = "xfce";
+stdenv.mkDerivation (finalAttrs: {
   pname = "xfce4-dev-tools";
-  version = "4.18.1";
+  version = "4.20.0";
 
-  sha256 = "sha256-JUyFlifNVhSnIMaI9qmgCtGIgkpmzYybMfuhPgJiDOg=";
+  src = fetchFromGitLab {
+    domain = "gitlab.xfce.org";
+    owner = "xfce";
+    repo = "xfce4-dev-tools";
+    rev = "xfce4-dev-tools-${finalAttrs.version}";
+    hash = "sha256-eUfNa/9ksLCKtVwBRtHaVl7Yl95tukUaDdoLNfeR+Ew=";
+  };
 
   nativeBuildInputs = [
     autoreconfHook
-    libxslt
     docbook_xsl
+    libxslt # for xsltproc
+    # x-d-t itself is not a meson project, but the xfce-do-release script wants
+    # `meson rewrite kwargs`, thus this is checked by `AC_CHECK_PROGS`.
+    meson
+    pkg-config
+    wrapGAppsHook3
+  ];
+
+  buildInputs = [
+    python3 # for xdt-gen-visibility
   ];
 
   propagatedBuildInputs = [
@@ -33,10 +54,23 @@ mkXfceDerivation {
     libtool
   ];
 
+  dontUseMesonConfigure = true;
+  configureFlags = [ "--enable-maintainer-mode" ];
+
+  enableParallelBuilding = true;
+
   setupHook = ./setup-hook.sh;
 
-  meta = with lib; {
-    description = "Autoconf macros and scripts to augment app build systems";
-    maintainers = with maintainers; [ ] ++ teams.xfce.members;
+  passthru.updateScript = gitUpdater {
+    rev-prefix = "xfce4-dev-tools-";
+    odd-unstable = true;
   };
-}
+
+  meta = with lib; {
+    homepage = "https://gitlab.xfce.org/xfce/xfce4-dev-tools";
+    description = "Autoconf macros and scripts to augment app build systems";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ ] ++ teams.xfce.members;
+    platforms = platforms.linux;
+  };
+})
diff --git a/pkgs/desktops/xfce/core/xfce4-panel/default.nix b/pkgs/desktops/xfce/core/xfce4-panel/default.nix
index 3d96f682dbca..cf664c9c6e7d 100644
--- a/pkgs/desktops/xfce/core/xfce4-panel/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-panel/default.nix
@@ -1,24 +1,28 @@
 { lib
 , mkXfceDerivation
+, cairo
 , exo
 , garcon
 , gobject-introspection
+, gtk-layer-shell
 , gtk3
 , libdbusmenu-gtk3
 , libwnck
 , libxfce4ui
 , libxfce4util
+, libxfce4windowing
 , tzdata
 , vala
+, wayland
 , xfconf
 }:
 
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-panel";
-  version = "4.18.6";
+  version = "4.20.0";
 
-  sha256 = "sha256-eQLz/LJIx2WkzcSLytRdJdhtGv0woT48mdqG7eHB0U4=";
+  sha256 = "sha256-oB7mlU7RZtRuCQAKgv5I7ZRRu703Za7Ki9+AkHSELRE=";
 
   nativeBuildInputs = [
     gobject-introspection
@@ -26,13 +30,17 @@ mkXfceDerivation {
   ];
 
   buildInputs = [
+    cairo
     exo
     garcon
+    gtk-layer-shell
     libdbusmenu-gtk3
     libxfce4ui
+    libxfce4windowing
     libwnck
-    xfconf
     tzdata
+    wayland
+    xfconf
   ];
 
   propagatedBuildInputs = [
@@ -40,8 +48,6 @@ mkXfceDerivation {
     libxfce4util
   ];
 
-  patches = [ ./xfce4-panel-datadir.patch ];
-
   postPatch = ''
     substituteInPlace plugins/clock/clock.c \
        --replace-fail "/usr/share/zoneinfo" "${tzdata}/share/zoneinfo"
diff --git a/pkgs/desktops/xfce/core/xfce4-panel/xfce4-panel-datadir.patch b/pkgs/desktops/xfce/core/xfce4-panel/xfce4-panel-datadir.patch
deleted file mode 100644
index ed9df9ef36f3..000000000000
--- a/pkgs/desktops/xfce/core/xfce4-panel/xfce4-panel-datadir.patch
+++ /dev/null
@@ -1,24 +0,0 @@
-diff --git a/panel/panel-module-factory.c b/panel/panel-module-factory.c
-index 529fe85..8c792b7 100644
---- a/panel/panel-module-factory.c
-+++ b/panel/panel-module-factory.c
-@@ -39,6 +39,7 @@
- #include <panel/panel-module.h>
- #include <panel/panel-module-factory.h>
- 
-+#define DATADIR "/run/current-system/sw/share/xfce4"
- #define PANEL_PLUGINS_DATA_DIR     (DATADIR G_DIR_SEPARATOR_S "panel" G_DIR_SEPARATOR_S "plugins")
- #define PANEL_PLUGINS_DATA_DIR_OLD (DATADIR G_DIR_SEPARATOR_S "panel-plugins")
- 
-diff --git a/panel/panel-module.c b/panel/panel-module.c
-index ba39320..519440b 100644
---- a/panel/panel-module.c
-+++ b/panel/panel-module.c
-@@ -35,6 +35,7 @@
- #include <panel/panel-plugin-external-wrapper.h>
- #include <panel/panel-plugin-external-46.h>
- 
-+#define LIBDIR "/run/current-system/sw/lib/xfce4"
- #define PANEL_PLUGINS_LIB_DIR (LIBDIR G_DIR_SEPARATOR_S "panel" G_DIR_SEPARATOR_S "plugins")
- #define PANEL_PLUGINS_LIB_DIR_OLD (LIBDIR G_DIR_SEPARATOR_S "panel-plugins")
- 
diff --git a/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix b/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
index 7c6d58d84bff..f2827a3458de 100644
--- a/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
@@ -1,10 +1,14 @@
 { lib
 , mkXfceDerivation
+, wayland-scanner
 , gtk3
 , libnotify
 , libxfce4ui
 , libxfce4util
+, polkit
 , upower
+, wayland-protocols
+, wlr-protocols
 , xfconf
 , xfce4-panel
 }:
@@ -12,16 +16,23 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-power-manager";
-  version = "4.18.4";
+  version = "4.20.0";
 
-  sha256 = "sha256-aybY+B8VC/XS6FO3XRpYuJd9Atr9Tc/Uo45q9fh3YLE=";
+  sha256 = "sha256-qKUdrr+giLzNemhT3EQsOKTSiIx50NakmK14Ak7ZOCE=";
+
+  nativeBuildInputs = [
+    wayland-scanner
+  ];
 
   buildInputs = [
     gtk3
     libnotify
     libxfce4ui
     libxfce4util
+    polkit
     upower
+    wayland-protocols
+    wlr-protocols
     xfconf
     xfce4-panel
   ];
@@ -29,8 +40,8 @@ mkXfceDerivation {
   # using /run/current-system/sw/bin instead of nix store path prevents polkit permission errors on
   # rebuild.  See https://github.com/NixOS/nixpkgs/issues/77485
   postPatch = ''
-    substituteInPlace src/org.xfce.power.policy.in2 --replace-fail "@sbindir@" "/run/current-system/sw/bin"
-    substituteInPlace common/xfpm-brightness.c --replace-fail "SBINDIR" "\"/run/current-system/sw/bin\""
+    substituteInPlace src/org.xfce.power.policy.in.in --replace-fail "@sbindir@" "/run/current-system/sw/bin"
+    substituteInPlace common/xfpm-brightness-polkit.c --replace-fail "SBINDIR" "\"/run/current-system/sw/bin\""
     substituteInPlace src/xfpm-suspend.c --replace-fail "SBINDIR" "\"/run/current-system/sw/bin\""
   '';
 
diff --git a/pkgs/desktops/xfce/core/xfce4-session/default.nix b/pkgs/desktops/xfce/core/xfce4-session/default.nix
index 5d2e21598d4f..79d131723e6f 100644
--- a/pkgs/desktops/xfce/core/xfce4-session/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-session/default.nix
@@ -4,9 +4,11 @@
 , exo
 , libxfce4util
 , libxfce4ui
+, libxfce4windowing
 , xfconf
 , iceauth
 , gtk3
+, gtk-layer-shell
 , glib
 , libwnck
 , xfce4-session
@@ -15,23 +17,28 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-session";
-  version = "4.18.4";
+  version = "4.20.0";
 
-  sha256 = "sha256-YxIHxb8mRggHLJ9TQ+KGb9qjt+DMZrxMn+oFuFRL8GI=";
+  sha256 = "sha256-mn3ky1NzrpQZRkhc605mj+GFhbFq26eW59YKUfnX9X8=";
 
   buildInputs = [
     exo
     gtk3
+    gtk-layer-shell
     glib
     libxfce4ui
     libxfce4util
+    libxfce4windowing
     libwnck
     xfconf
     polkit
     iceauth
   ];
 
-  configureFlags = [ "--with-xsession-prefix=${placeholder "out"}" ];
+  configureFlags = [
+    "--with-xsession-prefix=${placeholder "out"}"
+    "--with-wayland-session-prefix=${placeholder "out"}"
+  ];
 
   passthru.xinitrc = "${xfce4-session}/etc/xdg/xfce4/xinitrc";
 
diff --git a/pkgs/desktops/xfce/core/xfce4-settings/default.nix b/pkgs/desktops/xfce/core/xfce4-settings/default.nix
index 73f22d35f0fd..53b026f8be4d 100644
--- a/pkgs/desktops/xfce/core/xfce4-settings/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-settings/default.nix
@@ -1,8 +1,10 @@
 { lib
 , mkXfceDerivation
+, wayland-scanner
 , exo
 , garcon
 , gtk3
+, gtk-layer-shell
 , glib
 , libnotify
 , libxfce4ui
@@ -12,6 +14,7 @@
 # Disabled by default on upstream and actually causes issues:
 # https://gitlab.xfce.org/xfce/xfce4-settings/-/issues/222
 , withUpower ? false
+, wlr-protocols
 , xfconf
 , xf86inputlibinput
 , colord
@@ -21,19 +24,25 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-settings";
-  version = "4.18.6";
+  version = "4.20.0";
 
-  sha256 = "sha256-xiu26B3dbWu+/AtF/iUC6Wo2U5ZZyzN9RfdbBaQRJ1M=";
+  sha256 = "sha256-0fMuAucyxLr2VzQqAB0CL+HgkHNJctiVNZmUmTNzaPc=";
+
+  nativeBuildInputs = [
+    wayland-scanner
+  ];
 
   buildInputs = [
     exo
     garcon
     glib
     gtk3
+    gtk-layer-shell
     libnotify
     libxfce4ui
     libxfce4util
     libxklavier
+    wlr-protocols
     xf86inputlibinput
     xfconf
   ]
diff --git a/pkgs/desktops/xfce/core/xfconf/default.nix b/pkgs/desktops/xfce/core/xfconf/default.nix
index 45873f7ef248..82a33a4b458e 100644
--- a/pkgs/desktops/xfce/core/xfconf/default.nix
+++ b/pkgs/desktops/xfce/core/xfconf/default.nix
@@ -8,9 +8,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfconf";
-  version = "4.18.3";
+  version = "4.20.0";
 
-  sha256 = "sha256-Iu/LHyk/lOvu8uJuJRDxIkabiX0vZB4H99vVKRiugVo=";
+  sha256 = "sha256-U+Sk7ubBr1ZD1GLQXlxrx0NQdhV/WpVBbnLcc94Tjcw=";
 
   nativeBuildInputs = [ gobject-introspection vala ];
 
diff --git a/pkgs/desktops/xfce/core/xfdesktop/default.nix b/pkgs/desktops/xfce/core/xfdesktop/default.nix
index ed36d2b92b73..ab6900c28e1f 100644
--- a/pkgs/desktops/xfce/core/xfdesktop/default.nix
+++ b/pkgs/desktops/xfce/core/xfdesktop/default.nix
@@ -1,21 +1,37 @@
-{ lib, mkXfceDerivation, exo, gtk3, libxfce4ui, libxfce4util, libwnck, xfconf, libnotify, garcon, thunar }:
+{
+  lib,
+  mkXfceDerivation,
+  exo,
+  gtk3,
+  libxfce4ui,
+  libxfce4util,
+  libxfce4windowing,
+  libyaml,
+  xfconf,
+  libnotify,
+  garcon,
+  gtk-layer-shell,
+  thunar,
+}:
 
 mkXfceDerivation {
   category = "xfce";
   pname = "xfdesktop";
-  version = "4.18.1";
+  version = "4.20.0";
 
-  sha256 = "sha256-33G7X5kA3MCNJ9Aq9ZCafP0Qm/46iUmLFB8clhKwDz8=";
+  sha256 = "sha256-80g3lk1TkQI0fbYf2nXs36TrPlaGTHgH6k/TGOzRd3w=";
 
   buildInputs = [
     exo
     gtk3
     libxfce4ui
     libxfce4util
-    libwnck
+    libxfce4windowing
+    libyaml
     xfconf
     libnotify
     garcon
+    gtk-layer-shell
     thunar
   ];
 
diff --git a/pkgs/desktops/xfce/core/xfwm4/default.nix b/pkgs/desktops/xfce/core/xfwm4/default.nix
index abd08f5a6f3d..82c895cd41b1 100644
--- a/pkgs/desktops/xfce/core/xfwm4/default.nix
+++ b/pkgs/desktops/xfce/core/xfwm4/default.nix
@@ -5,9 +5,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfwm4";
-  version = "4.18.0";
+  version = "4.20.0";
 
-  sha256 = "sha256-nTPgxC0XMBJ48lPCeQgCvWWK1/2ZIoQOYsMeaxDpE1c=";
+  sha256 = "sha256-5UZQrAH0oz+G+7cvXCLDJ4GSXNJcyl4Ap9umb7h0f5Q=";
 
   nativeBuildInputs = [ exo librsvg ];
 
diff --git a/pkgs/desktops/xfce/default.nix b/pkgs/desktops/xfce/default.nix
index 5d0efd28bfe9..dabfe761a7ba 100644
--- a/pkgs/desktops/xfce/default.nix
+++ b/pkgs/desktops/xfce/default.nix
@@ -61,11 +61,7 @@ makeScopeWithSplicing' {
 
       xfce4-appfinder = callPackage ./core/xfce4-appfinder { };
 
-      xfce4-dev-tools = callPackage ./core/xfce4-dev-tools {
-        mkXfceDerivation = self.mkXfceDerivation.override {
-          xfce4-dev-tools = null;
-        };
-      };
+      xfce4-dev-tools = callPackage ./core/xfce4-dev-tools { };
 
       #### APPLICATIONS
 
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-docklike-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-docklike-plugin/default.nix
index 3f9b414e7713..b4f6121033d0 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-docklike-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-docklike-plugin/default.nix
@@ -3,32 +3,33 @@
 , cairo
 , glib
 , gtk3
+, gtk-layer-shell
 , libX11
 , libxfce4ui
 , libxfce4util
 , xfce4-panel
-, libwnck
+, libxfce4windowing
 }:
 
 mkXfceDerivation {
   category = "panel-plugins";
   pname = "xfce4-docklike-plugin";
-  version = "0.4.2";
-  sha256 = "sha256-M/V8cnEU/nSEDjQ3k8fWiklF5OuNg3uzzJMHBSZBiLU=";
+  version = "0.4.2-unstable-2024-11-04";
+  rev = "1154bf1c9f291d5699663910d5aac71bb3ab2227";
+  sha256 = "sha256-uno3qNyuesK/hJMdAxHZS6XMysr7ySOgJ5ACXGcIWFs=";
 
   buildInputs = [
     cairo
     glib
     gtk3
+    gtk-layer-shell
     libX11
     libxfce4ui
     libxfce4util
     xfce4-panel
-    libwnck
+    libxfce4windowing
   ];
 
-  NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
-
   meta = with lib; {
     homepage = "https://docs.xfce.org/panel-plugins/xfce4-docklike-plugin/start";
     description = "Modern, minimalist taskbar for Xfce";
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-pulseaudio-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-pulseaudio-plugin/default.nix
index b14ebb67374a..71e604ddc5f0 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-pulseaudio-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-pulseaudio-plugin/default.nix
@@ -7,6 +7,7 @@
 , libnotify
 , libxfce4ui
 , libxfce4util
+, libxfce4windowing
 , xfce4-panel
 , xfconf
 , keybinder3
@@ -16,12 +17,8 @@
 mkXfceDerivation {
   category = "panel-plugins";
   pname = "xfce4-pulseaudio-plugin";
-  version = "0.4.8";
-  sha256 = "sha256-7vcjARm0O+/hVNFzOpxcgAnqD+wRNg5/eqXLcq4t/iU=";
-
-  postPatch = ''
-    substituteInPlace configure.ac.in --replace gio-2.0 gio-unix-2.0
-  '';
+  version = "0.4.9";
+  sha256 = "sha256-bJp4HicAFPuRATDHus0DfJFy1c6gw6Tkpd2UN7SXqsI=";
 
   buildInputs = [
     exo
@@ -33,6 +30,7 @@ mkXfceDerivation {
     libpulseaudio
     libxfce4ui
     libxfce4util
+    libxfce4windowing
     xfce4-panel
     xfconf
   ];