diff --git a/examples/testing/qemu-cryptsetup/configuration.nix b/examples/testing/qemu-cryptsetup/configuration.nix
index 561c0f2c..11f78840 100644
--- a/examples/testing/qemu-cryptsetup/configuration.nix
+++ b/examples/testing/qemu-cryptsetup/configuration.nix
@@ -18,6 +18,10 @@ let
   encryptedRootfs = pkgs.vmTools.runInLinuxVM (
     pkgs.runCommand "encrypted-rootfs" {
       buildInputs = [ pkgs.cryptsetup ];
+      passthru = {
+        filename = "encrypted.img";
+        filesystemType = "LUKS";
+      };
     } ''
       (PS4=" $ "; set -x
       mkdir -p /run/cryptsetup
diff --git a/examples/testing/qemu-cryptsetup/default.nix b/examples/testing/qemu-cryptsetup/default.nix
index 436e432a..f40a0cac 100644
--- a/examples/testing/qemu-cryptsetup/default.nix
+++ b/examples/testing/qemu-cryptsetup/default.nix
@@ -1,5 +1,5 @@
 let
-  device = "qemu-x86_64";
+  device = "uefi-x86_64";
   system-build = import ../../../. {
     inherit device;
     configuration = [ { imports = [