diff --git a/Library/Homebrew/dev-cmd/extract.rb b/Library/Homebrew/dev-cmd/extract.rb
index 6063f9314f..bef3247be9 100644
--- a/Library/Homebrew/dev-cmd/extract.rb
+++ b/Library/Homebrew/dev-cmd/extract.rb
@@ -1,4 +1,4 @@
-# typed: true # rubocop:disable Sorbet/StrictSigil
+# typed: strict
 # frozen_string_literal: true
 
 require "abstract_command"
@@ -172,7 +172,8 @@ module Homebrew
         with_monkey_patch { Formulary.from_contents(name, file, contents, ignore_errors: true) }
       end
 
-      def with_monkey_patch
+      sig { params(_block: T.proc.void).returns(T.untyped) }
+      def with_monkey_patch(&_block)
         # Since `method_defined?` is not a supported type guard, the use of `alias_method` below is not typesafe:
         BottleSpecification.class_eval do
           T.unsafe(self).alias_method :old_method_missing, :method_missing if method_defined?(:method_missing)
@@ -210,28 +211,28 @@ module Homebrew
         BottleSpecification.class_eval do
           if method_defined?(:old_method_missing)
             T.unsafe(self).alias_method :method_missing, :old_method_missing
-            undef :old_method_missing
+            T.unsafe(self).undef :old_method_missing
           end
         end
 
         Module.class_eval do
           if method_defined?(:old_method_missing)
             T.unsafe(self).alias_method :method_missing, :old_method_missing
-            undef :old_method_missing
+            T.unsafe(self).undef :old_method_missing
           end
         end
 
         Resource.class_eval do
           if method_defined?(:old_method_missing)
             T.unsafe(self).alias_method :method_missing, :old_method_missing
-            undef :old_method_missing
+            T.unsafe(self).undef :old_method_missing
           end
         end
 
         DependencyCollector.class_eval do
           if method_defined?(:old_parse_symbol_spec)
             T.unsafe(self).alias_method :parse_symbol_spec, :old_parse_symbol_spec
-            undef :old_parse_symbol_spec
+            T.unsafe(self).undef :old_parse_symbol_spec
           end
         end
       end