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Diffstat (limited to 'nixos/lib/make-disk-image.nix')
-rw-r--r--nixos/lib/make-disk-image.nix6
1 files changed, 4 insertions, 2 deletions
diff --git a/nixos/lib/make-disk-image.nix b/nixos/lib/make-disk-image.nix
index 7387bf147385..caf0ab4c07b5 100644
--- a/nixos/lib/make-disk-image.nix
+++ b/nixos/lib/make-disk-image.nix
@@ -23,6 +23,8 @@
   postVM ? ""
 
 , name ? "nixos-disk-image"
+
+, format ? "raw"
 }:
 
 with lib;
@@ -32,8 +34,8 @@ pkgs.vmTools.runInLinuxVM (
     { preVM =
         ''
           mkdir $out
-          diskImage=$out/nixos.img
-          ${pkgs.vmTools.qemu}/bin/qemu-img create -f raw $diskImage "${toString diskSize}M"
+          diskImage=$out/nixos.${if format == "qcow2" then "qcow2" else "img"}
+          ${pkgs.vmTools.qemu}/bin/qemu-img create -f ${format} $diskImage "${toString diskSize}M"
           mv closure xchg/
         '';
       buildInputs = [ pkgs.utillinux pkgs.perl pkgs.e2fsprogs pkgs.parted ];