diff --git a/hosts/petalburg/default.nix b/hosts/petalburg/default.nix
index 74c1c4c4..932ec9f9 100644
--- a/hosts/petalburg/default.nix
+++ b/hosts/petalburg/default.nix
@@ -37,18 +37,19 @@
     runtimeInputs = [pkgs.libnotify pkgs.power-profiles-daemon];
 
     text = ''
-      current_profile=$(powerprofilesctl get | tr -d '[:space:]')
+      # Only works on petalburg.
+      current_profile=$(${pkgs.power-profiles-daemon}/bin/powerprofilesctl get | tr -d '[:space:]')
 
       if [ "$current_profile" == "power-saver" ]; then
-          powerprofilesctl set balanced
+          ${pkgs.power-profiles-daemon}/bin/powerprofilesctl set balanced
       elif [ "$current_profile" == "balanced" ]; then
-          powerprofilesctl set performance
+          ${pkgs.power-profiles-daemon}/bin/powerprofilesctl set performance
       elif [ "$current_profile" == "performance" ]; then
-          powerprofilesctl set power-saver
+          ${pkgs.power-profiles-daemon}/bin/powerprofilesctl set power-saver
       fi
 
-      new_profile=$(powerprofilesctl get | tr -d '[:space:]')
-      notify-send "Power profile set to $new_profile."
+      new_profile=$(${pkgs.power-profiles-daemon}/bin/powerprofilesctl get | tr -d '[:space:]')
+      ${pkgs.libnotify}/bin/notify-send "Power profile set to $new_profile."
     '';
   };
 in {