diff --git a/Library/Homebrew/api.rb b/Library/Homebrew/api.rb
index 9b60a85b3c..daa1e30f53 100644
--- a/Library/Homebrew/api.rb
+++ b/Library/Homebrew/api.rb
@@ -159,8 +159,10 @@ module Homebrew
 
     sig { params(json: Hash).returns(Hash) }
     def self.merge_variations(json)
-      if (bottle_tag = ::Utils::Bottles.tag.to_s.presence) &&
-         (variations = json["variations"].presence) &&
+      bottle_tag = ::Utils::Bottles::Tag.new(system: Homebrew::SimulateSystem.current_os,
+                                             arch:   Homebrew::SimulateSystem.current_arch)
+
+      if (variations = json["variations"].presence) &&
          (variation = variations[bottle_tag].presence)
         json = json.merge(variation)
       end