diff --git a/src/bitte/cli/rebuild.cr b/src/bitte/cli/rebuild.cr
index 9efc117..61f062b 100644
--- a/src/bitte/cli/rebuild.cr
+++ b/src/bitte/cli/rebuild.cr
@@ -40,17 +40,19 @@ module Bitte
           sleep(ch_count * 2) # this works around https://github.com/NixOS/nix/issues/3794
         end
 
-        cluster.asgs.each do |name, asg|
-          asg.instances.each do |instance|
-            next if skip?(name)
-            ch_count += 1
-            parallel_copy channel: ch,
-              name: instance.name,
-              ip: instance.public_ip.not_nil!,
-              flake: flake,
-              flake_attr: asg.flake_attr,
-              uid: asg.uid
-            sleep(ch_count * 2) # this works around https://github.com/NixOS/nix/issues/3794
+        if asgs = cluster.asgs
+          asgs.each do |name, asg|
+            asg.instances.each do |instance|
+              next if skip?(name)
+              ch_count += 1
+              parallel_copy channel: ch,
+                name: instance.name,
+                ip: instance.public_ip.not_nil!,
+                flake: flake,
+                flake_attr: asg.flake_attr,
+                uid: asg.uid
+              sleep(ch_count * 2) # this works around https://github.com/NixOS/nix/issues/3794
+            end
           end
         end
 
diff --git a/src/bitte/cli/ssh-for-each.cr b/src/bitte/cli/ssh-for-each.cr
index 3feaadb..5189d93 100644
--- a/src/bitte/cli/ssh-for-each.cr
+++ b/src/bitte/cli/ssh-for-each.cr
@@ -21,7 +21,9 @@ module Bitte
           parallel_ssh ch, name, instance.public_ip, @argv.map(&.to_s)
         end
 
-        cluster.asgs.each do |name, asg|
+        return unless asgs = cluster.asgs
+
+        asgs.each do |name, asg|
           asg.instances.each do |instance|
             next unless ip = instance.public_ip
             ch_count += 1
diff --git a/src/bitte/cluster.cr b/src/bitte/cluster.cr
index a87dbf6..3509061 100644
--- a/src/bitte/cluster.cr
+++ b/src/bitte/cluster.cr
@@ -8,14 +8,15 @@ module Bitte
       mem = IO::Memory.new
       sh!("terraform", args: ["output", "-json", "cluster"], output: mem)
       from_json(mem.to_s).tap do |cluster|
-        cluster.asgs.each do |name, asg|
+        next unless asgs = cluster.asgs
+        asgs.each do |name, asg|
           asg.cluster = cluster
           asg.name = name
         end
       end
     end
 
-    property asgs : Hash(String, ASG)
+    property asgs : Hash(String, ASG)?
     property flake : String
     property instances : Hash(String, Instance)
     property kms : String