diff --git a/lib/rscons/builders/object.rb b/lib/rscons/builders/object.rb
index 84a83d1..98e5618 100644
--- a/lib/rscons/builders/object.rb
+++ b/lib/rscons/builders/object.rb
@@ -93,8 +93,6 @@ module Rscons
         end.first
         command = @env.build_command("${#{com_prefix}CMD}", @vars)
         @env.produces(@target, @vars["_DEPFILE"])
-        # Store vars back into options so new keys are accessible in #finalize.
-        options[:vars] = vars
         standard_threaded_build("#{com_prefix} #{@target}", @target, command, @sources, @env, @cache)
       end
 
@@ -106,12 +104,12 @@ module Rscons
       #   Name of the target file on success or nil on failure.
       def finalize(options)
         if options[:command_status]
-          target, deps, cache, env, vars = options.values_at(:target, :sources, :cache, :env, :vars)
-          if File.exists?(vars['_DEPFILE'])
-            deps += Util.parse_makefile_deps(vars['_DEPFILE'])
+          deps = @sources
+          if File.exists?(@vars['_DEPFILE'])
+            deps += Util.parse_makefile_deps(@vars['_DEPFILE'])
           end
-          cache.register_build(target, options[:tc].command, deps.uniq, env)
-          target
+          @cache.register_build(@target, options[:tc].command, deps.uniq, @env)
+          @target
         end
       end
 
diff --git a/lib/rscons/builders/preprocess.rb b/lib/rscons/builders/preprocess.rb
index c0245bc..befc981 100644
--- a/lib/rscons/builders/preprocess.rb
+++ b/lib/rscons/builders/preprocess.rb
@@ -33,8 +33,6 @@ module Rscons
         @vars["_DEPFILE"] = Rscons.set_suffix(target, env.expand_varref("${DEPFILESUFFIX}", vars))
         command = @env.build_command("${CPP_CMD}", @vars)
         @env.produces(@target, @vars["_DEPFILE"])
-        # Store vars back into options so new keys are accessible in #finalize.
-        options[:vars] = vars
         standard_threaded_build("#{name} #{@target}", @target, command, @sources, @env, @cache)
       end
 
@@ -46,12 +44,12 @@ module Rscons
       #   Name of the target file on success or nil on failure.
       def finalize(options)
         if options[:command_status]
-          target, deps, cache, env, vars = options.values_at(:target, :sources, :cache, :env, :vars)
-          if File.exists?(vars['_DEPFILE'])
-            deps += Util.parse_makefile_deps(vars['_DEPFILE'])
+          deps = @sources
+          if File.exists?(@vars['_DEPFILE'])
+            deps += Util.parse_makefile_deps(@vars['_DEPFILE'])
           end
-          cache.register_build(target, options[:tc].command, deps.uniq, env)
-          target
+          @cache.register_build(@target, options[:tc].command, deps.uniq, @env)
+          @target
         end
       end
 
diff --git a/lib/rscons/builders/shared_object.rb b/lib/rscons/builders/shared_object.rb
index 3a43ee6..968481a 100644
--- a/lib/rscons/builders/shared_object.rb
+++ b/lib/rscons/builders/shared_object.rb
@@ -78,8 +78,6 @@ module Rscons
         end.first
         command = @env.build_command("${#{com_prefix}CMD}", @vars)
         @env.produces(@target, @vars["_DEPFILE"])
-        # Store vars back into options so new keys are accessible in #finalize.
-        options[:vars] = @vars
         standard_threaded_build("#{com_prefix} #{@target}", @target, command, @sources, @env, @cache)
       end
 
@@ -91,12 +89,12 @@ module Rscons
       #   Name of the target file on success or nil on failure.
       def finalize(options)
         if options[:command_status]
-          target, deps, cache, env, vars = options.values_at(:target, :sources, :cache, :env, :vars)
-          if File.exists?(vars['_DEPFILE'])
-            deps += Util.parse_makefile_deps(vars['_DEPFILE'])
+          deps = @sources
+          if File.exists?(@vars['_DEPFILE'])
+            deps += Util.parse_makefile_deps(@vars['_DEPFILE'])
           end
-          cache.register_build(target, options[:tc].command, deps.uniq, env)
-          target
+          @cache.register_build(@target, options[:tc].command, deps.uniq, @env)
+          @target
         end
       end