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-rw-r--r--nixos/maintainers/scripts/ec2/amazon-image.nix5
1 files changed, 3 insertions, 2 deletions
diff --git a/nixos/maintainers/scripts/ec2/amazon-image.nix b/nixos/maintainers/scripts/ec2/amazon-image.nix
index b09f4ca47a3..677aff4421e 100644
--- a/nixos/maintainers/scripts/ec2/amazon-image.nix
+++ b/nixos/maintainers/scripts/ec2/amazon-image.nix
@@ -40,8 +40,9 @@ in {
     };
 
     sizeMB = mkOption {
-      type = types.int;
+      type = with types; either (enum [ "auto" ]) int;
       default = if config.ec2.hvm then 2048 else 8192;
+      example = 8192;
       description = "The size in MB of the image";
     };
 
@@ -57,7 +58,7 @@ in {
     inherit (cfg) contents format name;
     pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
     partitionTableType = if config.ec2.efi then "efi"
-                         else if config.ec2.hvm then "legacy"
+                         else if config.ec2.hvm then "legacy+gpt"
                          else "none";
     diskSize = cfg.sizeMB;
     fsType = "ext4";