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\""
   '';