diff --git a/lagarto-ox.nix b/lagarto-ox.nix
index a34ac6a..c5aa356 100644
--- a/lagarto-ox.nix
+++ b/lagarto-ox.nix
@@ -625,7 +625,7 @@
 
       installPhase = ''
         mkdir -p $out
-        tar -I zstd -cvf $out/${COMMIT}.tar.zst nixos-riscv
+        tar --zstd -cvf $out/${COMMIT}.tar.zst nixos-riscv
       '';
 
       nativeBuildInputs = with final.buildPackages; [ rsync zstd ];