diff --git a/ext/-test-/win32/dln/depend b/ext/-test-/win32/dln/depend
new file mode 100644
index 0000000000..712fefa29a
--- /dev/null
+++ b/ext/-test-/win32/dln/depend
@@ -0,0 +1,9 @@
+$(TARGET_SO): $(DLNTESTLIB)
+
+$(DLNTESTLIB): $(topdir)/dlntest.dll
+
+$(topdir)/dlntest.dll: libdlntest.o libdlntest.def
+	$(ECHO) linking shared-object $(@F)
+	-$(Q)$(RM) $@
+	-$(Q)$(MAKEDIRS) $(@D)
+	$(Q) $(DLNTEST_LDSHARED)
diff --git a/ext/-test-/win32/dln/extconf.rb b/ext/-test-/win32/dln/extconf.rb
index 57cee23b40..edc02ac3f2 100644
--- a/ext/-test-/win32/dln/extconf.rb
+++ b/ext/-test-/win32/dln/extconf.rb
@@ -1,37 +1,32 @@
 if $mingw or $mswin
+  dlntestlib = "dlntest.#{$LIBEXT}"
+  $LOCAL_LIBS << " #{dlntestlib}"
+  $srcs = ["dlntest.c"]
   $objs = ["dlntest.o"]
   testdll = "$(topdir)/dlntest.dll"
   $cleanfiles << testdll
   $cleanfiles << "dlntest.#{$LIBEXT}"
   config_string('cleanobjs') {|t| $cleanfiles.concat(t.gsub(/\$\*/, 'dlntest').split)}
 
-  create_makefile("-test-/win32/dln")
-  m = File.read("Makefile")
-  dlntestlib = "dlntest.#{$LIBEXT}"
-  m.sub!(/^OBJS =.*/) {"#{$&} #{dlntestlib}"}
-  FileUtils.rm_f(RbConfig.expand(testdll.dup))
-  open("Makefile", "wb") do |mf|
-    mf.puts m, "\n"
-    sodir = $extout ? "$(RUBYARCHDIR)/" : ''
-    mf.print "#{sodir}$(DLLIB): #{dlntestlib}"
-    mf.puts
-    mf.puts "#{dlntestlib}: $(topdir)/dlntest.dll"
-    mf.puts
+  create_makefile("-test-/win32/dln") do |m|
+    m << "\n""DLNTESTLIB = #{dlntestlib}\n"
     if $mingw
-      mf.puts "$(topdir)/dlntest.dll: DEFFILE := $(srcdir)/libdlntest.def"
-      mf.puts "$(topdir)/dlntest.dll: DLDFLAGS += -Wl,--out-implib,#{dlntestlib}"
+      m << "\n"
+      m << "$(topdir)/dlntest.dll: DEFFILE := $(srcdir)/libdlntest.def\n"
+      m << "$(topdir)/dlntest.dll: DLDFLAGS += -Wl,--out-implib,$(DLNTESTLIB)\n"
     end
-    mf.puts depend_rules("$(topdir)/dlntest.dll: libdlntest.o libdlntest.def")
-    mf.puts "\t$(ECHO) linking shared-object $(@F)\n"
-    mf.print "\t-$(Q)$(RM) $@\n"
-    mf.print "\t-$(Q)$(MAKEDIRS) $(@D)\n" if $extout
-    link_so = LINK_SO.gsub(/^/, "\t$(Q) ")
+    m
+  end
+  m = File.read("Makefile")
+  m.sub!(/(.*)\$\(DLNTEST_LDSHARED\)$/) do
+    pre = $1
+    link_so = LINK_SO.gsub(/^/) {pre}
     link_so.sub!(/\$\(LOCAL_LIBS\)/, '')
     link_so.gsub!(/-\$\(arch\)/, '')
     link_so.gsub!(/:.so=/, ':.dll=')
     link_so.sub!(/\$\(OBJS\)/, "libdlntest.#{$OBJEXT}")
     link_so.sub!(/\$\(DEFFILE\)/, "$(srcdir)/libdlntest.def")
-    mf.puts link_so
-    mf.puts
-  end
+    link_so
+  end and File.binwrite("Makefile", m)
+  FileUtils.rm_f(RbConfig.expand(testdll.dup))
 end