diff --git a/home/fuji/home.nix b/home/fuji/home.nix
index 886fdd7..bbbcb40 100644
--- a/home/fuji/home.nix
+++ b/home/fuji/home.nix
@@ -287,15 +287,15 @@ in
           LOCK_ARGS=""
           for OUTPUT in $( ${inputs.att_wm.packages.${system}.default}/bin/att_wmctl state | ${lib.getExe pkgs.jq} -r '.outputs[].name')
           do
-            TMP_FILE=$(${pkgs.coreutils}/bin/mktemp /tmp/.swaylock_ss_XXXXXX.png)
+            TMP_FILE=$(${pkgs.coreutils}/bin/mktemp /tmp/.swaylock_ss_XXXXXX.ppm)
             ${lib.getExe pkgs.grim} -t ppm -o $OUTPUT - | \
             ${lib.getExe pkgs.ffmpeg} -y -loglevel 0 -i - -vframes 1 -vf "boxblur=10" "$TMP_FILE"
-            LOCK_ARGS="$LOCK_ARGS --image $OUTPUT:$TMP_FILE"
             ALL_IMGS="$ALL_IMGS $TMP_FILE"
           done
-          ${lib.getExe inputs.att_lock.packages.${system}.default} -i $ALL_IMGS
-          ${pkgs.coreutils}/bin/shred $ALL_IMGS
-          ${pkgs.coreutils}/bin/rm $ALL_IMGS
+          ${lib.getExe inputs.att_lock.packages.${system}.default} -i $ALL_IMGS &
+	  ${pkgs.coreutils}/bin/sleep 0.2
+          ${pkgs.coreutils}/bin/shred $ALL_IMGS &
+          ${pkgs.coreutils}/bin/rm $ALL_IMGS &
         '';
       in
       {