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-rw-r--r--nixos/lib/make-squashfs.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/lib/make-squashfs.nix b/nixos/lib/make-squashfs.nix
index 3b640334e17..2baa4f66760 100644
--- a/nixos/lib/make-squashfs.nix
+++ b/nixos/lib/make-squashfs.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation {
 
       # Generate the squashfs image.
       mksquashfs nix-path-registration $storePaths $out \
-        -keep-as-directory -all-root
+        -keep-as-directory -all-root -comp xz
     '';
 }