diff --git a/Library/Homebrew/installed_dependents.rb b/Library/Homebrew/installed_dependents.rb
index 251707fc34..abead8d477 100644
--- a/Library/Homebrew/installed_dependents.rb
+++ b/Library/Homebrew/installed_dependents.rb
@@ -50,8 +50,10 @@ module InstalledDependents
       when Formula
         dependent.missing_dependencies(hide: keg_names)
       when Cask::Cask
-        # When checking for cask dependents, we don't care about missing dependencies
-        CaskDependent.new(dependent).runtime_dependencies(ignore_missing: true).reject do |dependency|
+        # When checking for cask dependents, we don't care about missing or build dependencies
+        CaskDependent.new(dependent)
+                     .runtime_dependencies(ignore_missing: true)
+                     .reject do |dependency|
           dependency.tags.include?(:build)
         end.map(&:to_formula)
       end