diff --git a/krebs/3modules/fetchWallpaper.nix b/krebs/3modules/fetchWallpaper.nix
index 53fe0839d..e6bb06a95 100644
--- a/krebs/3modules/fetchWallpaper.nix
+++ b/krebs/3modules/fetchWallpaper.nix
@@ -40,9 +40,7 @@ let
     };
   };
 
-  fetchWallpaperScript = pkgs.writeScript "fetchWallpaper" ''
-    #! ${pkgs.bash}/bin/bash
-
+  fetchWallpaperScript = pkgs.writeDash "fetchWallpaper" ''
     mkdir -p ${shell.escape cfg.stateDir}
     curl -s -o ${shell.escape cfg.stateDir}/wallpaper -z ${shell.escape cfg.stateDir}/wallpaper ${shell.escape cfg.url}
     feh --no-fehbg --bg-scale ${shell.escape cfg.stateDir}/wallpaper