diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 437b56f5a3..6e714d12ee 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -1593,7 +1593,7 @@ on_request: installed_on_request?, options:)
 
     keg = Keg.new(formula.prefix)
     skip_linkage = formula.bottle_specification.skip_relocation?
-    keg.replace_placeholders_with_locations(tab.changed_files&.map { Pathname(_1) }, skip_linkage:)
+    keg.replace_placeholders_with_locations(tab.changed_files, skip_linkage:)
 
     cellar = formula.bottle_specification.tag_to_cellar(Utils::Bottles.tag)
     return if [:any, :any_skip_relocation].include?(cellar)
diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index d95edf2c30..1f5985b5f1 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -52,7 +52,14 @@ class AbstractTab
     @built_on = T.let(nil, T.nilable(T::Hash[String, T.untyped]))
     @runtime_dependencies = T.let(nil, T.nilable(T::Array[T.untyped]))
 
-    attributes.each { |key, value| instance_variable_set(:"@#{key}", value) }
+    attributes.each do |key, value|
+      case key.to_sym
+      when :changed_files
+        @changed_files = value&.map { |f| Pathname(f) }
+      else
+        instance_variable_set(:"@#{key}", value)
+      end
+    end
   end
 
   # Instantiates a {Tab} for a new installation of a formula or cask.