diff --git a/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix b/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
index c483c58c8172..5710f6ea0df5 100644
--- a/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
+++ b/pkgs/desktops/xfce/core/xfce4-power-manager/default.nix
@@ -12,9 +12,9 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfce4-power-manager";
-  version = "4.18.3";
+  version = "4.18.4";
 
-  sha256 = "sha256-CuW2siApho7u8P01t15dAiqNAiwQzAMZsEugYuKN4kM=";
+  sha256 = "sha256-aybY+B8VC/XS6FO3XRpYuJd9Atr9Tc/Uo45q9fh3YLE=";
 
   buildInputs = [
     gtk3
@@ -29,9 +29,9 @@ 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 "@sbindir@" "/run/current-system/sw/bin"
-    substituteInPlace common/xfpm-brightness.c --replace "SBINDIR" "\"/run/current-system/sw/bin\""
-    substituteInPlace src/xfpm-suspend.c --replace "SBINDIR" "\"/run/current-system/sw/bin\""
+    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/xfpm-suspend.c --replace-fail "SBINDIR" "\"/run/current-system/sw/bin\""
   '';
 
   meta = with lib; {