diff --git a/pkgs/by-name/lu/lumafly/package.nix b/pkgs/by-name/lu/lumafly/package.nix
index 397b0e1b820a..1f36430c1997 100644
--- a/pkgs/by-name/lu/lumafly/package.nix
+++ b/pkgs/by-name/lu/lumafly/package.nix
@@ -9,7 +9,7 @@
   icoutils,
   copyDesktopItems,
   makeDesktopItem,
-  writeScript,
+  nix-update-script,
 }:
 buildDotnetModule rec {
   pname = "lumafly";
@@ -34,16 +34,7 @@ buildDotnetModule rec {
 
   selfContainedBuild = true;
 
-  passthru.updateScript = writeScript "update-lumafly" ''
-    #!/usr/bin/env nix-shell
-    #!nix-shell --pure -i bash -p bash nix nix-update git cacert
-    set -eo pipefail
-
-    prev_version=$(nix eval --raw -f. lumafly.version)
-    nix-update lumafly
-    [[ $(nix eval --raw -f. lumafly.version) == "$prev_version" ]] ||
-      $(nix-build . -A lumafly.fetch-deps --no-out-link)
-  '';
+  passthru.updateScript = nix-update-script { };
 
   runtimeDeps = [
     zlib