diff --git a/Rakefile b/Rakefile
index e75a8cf1..24f9c60f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -33,10 +33,11 @@ spec = Gem::Specification.new do |s|
   s.extensions = 'bindings/ruby/extconf.rb'
   s.files =
     %w(COPYING EXCEPTIONS README Rakefile version.properties) +
-    %w(bindings/SigarWrapper.pm) +
+    %w(bindings/SigarWrapper.pm bindings/SigarBuild.pm) +
     Dir.glob("bindings/ruby/**/*") +
     Dir.glob("include/*.h") +
-    Dir.glob("src/**/*.[ch]")
+    Dir.glob("src/**/*.[ch]") +
+    Dir.glob("src/**/*.in")
 end
 
 Rake::GemPackageTask.new(spec) do |pkg|
@@ -100,3 +101,10 @@ task :examples => [:build] do
     system(cmd)
   end
 end
+
+desc "create a gemspec file"
+task :make_spec do
+  File.open("#{GEM}.gemspec", "w") do |file|
+    file.puts spec.to_ruby
+  end
+end
diff --git a/sigar.gemspec b/sigar.gemspec
deleted file mode 100644
index 6cc4c952..00000000
--- a/sigar.gemspec
+++ /dev/null
@@ -1,28 +0,0 @@
-# -*- encoding: utf-8 -*-
-
-Gem::Specification.new do |s|
-  s.name = %q{sigar}
-  s.version = "0.7.0"
-
-  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
-  s.authors = ["Doug MacEachern"]
-  s.date = %q{2010-01-17}
-  s.description = %q{System Information Gatherer And Reporter}
-  s.email = %q{sigar-users@hyperic.org}
-  s.extensions = ["bindings/ruby/extconf.rb"]
-  s.files = ["COPYING", "EXCEPTIONS", "README", "Rakefile", "version.properties", "bindings/SigarWrapper.pm", "bindings/ruby/darwin_sigar.c", "bindings/ruby/darwin_sigar.o", "bindings/ruby/examples", "bindings/ruby/examples/cpu_info.rb", "bindings/ruby/examples/df.rb", "bindings/ruby/examples/free.rb", "bindings/ruby/examples/ifconfig.rb", "bindings/ruby/examples/logging.rb", "bindings/ruby/examples/net_info.rb", "bindings/ruby/examples/netstat.rb", "bindings/ruby/examples/pargs.rb", "bindings/ruby/examples/penv.rb", "bindings/ruby/examples/route.rb", "bindings/ruby/examples/version.rb", "bindings/ruby/examples/who.rb", "bindings/ruby/extconf.rb", "bindings/ruby/Makefile", "bindings/ruby/pkg", "bindings/ruby/rbsigar.c", "bindings/ruby/rbsigar.o", "bindings/ruby/rbsigar_generated.rx", "bindings/ruby/sigar.bundle", "bindings/ruby/sigar.c", "bindings/ruby/sigar.o", "bindings/ruby/sigar_cache.c", "bindings/ruby/sigar_cache.o", "bindings/ruby/sigar_fileinfo.c", "bindings/ruby/sigar_fileinfo.o", "bindings/ruby/sigar_format.c", "bindings/ruby/sigar_format.o", "bindings/ruby/sigar_getline.c", "bindings/ruby/sigar_getline.o", "bindings/ruby/sigar_ptql.c", "bindings/ruby/sigar_ptql.o", "bindings/ruby/sigar_signal.c", "bindings/ruby/sigar_signal.o", "bindings/ruby/sigar_util.c", "bindings/ruby/sigar_util.o", "bindings/ruby/sigar_version.c", "bindings/ruby/sigar_version.o", "bindings/ruby/test", "bindings/ruby/test/cpu_test.rb", "bindings/ruby/test/file_system_test.rb", "bindings/ruby/test/helper.rb", "bindings/ruby/test/loadavg_test.rb", "bindings/ruby/test/mem_test.rb", "bindings/ruby/test/swap_test.rb", "bindings/ruby/test/uptime_test.rb", "include/sigar.h", "include/sigar_fileinfo.h", "include/sigar_format.h", "include/sigar_getline.h", "include/sigar_log.h", "include/sigar_private.h", "include/sigar_ptql.h", "include/sigar_util.h", "src/os/aix/aix_sigar.c", "src/os/aix/sigar_os.h", "src/os/darwin/darwin_sigar.c", "src/os/darwin/sigar_os.h", "src/os/hpux/dlpi.c", "src/os/hpux/hpux_sigar.c", "src/os/hpux/sigar_os.h", "src/os/linux/linux_sigar.c", "src/os/linux/sigar_os.h", "src/os/netware/netware_sigar.c", "src/os/netware/sigar_os.h", "src/os/osf1/osf1_sigar.c", "src/os/osf1/sigar_os.h", "src/os/solaris/get_mib2.c", "src/os/solaris/get_mib2.h", "src/os/solaris/hmekstat.h", "src/os/solaris/kstats.c", "src/os/solaris/procfs.c", "src/os/solaris/sigar_os.h", "src/os/solaris/solaris_sigar.c", "src/os/stub/sigar_os.h", "src/os/stub/stub_sigar.c", "src/os/win32/peb.c", "src/os/win32/sigar_os.h", "src/os/win32/sigar_pdh.h", "src/os/win32/win32_sigar.c", "src/sigar.c", "src/sigar_cache.c", "src/sigar_fileinfo.c", "src/sigar_format.c", "src/sigar_getline.c", "src/sigar_ptql.c", "src/sigar_signal.c", "src/sigar_util.c"]
-  s.homepage = %q{http://sigar.hyperic.com/}
-  s.require_paths = ["lib"]
-  s.rubygems_version = %q{1.3.5}
-  s.summary = %q{System Information Gatherer And Reporter}
-
-  if s.respond_to? :specification_version then
-    current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
-    s.specification_version = 3
-
-    if Gem::Version.new(Gem::RubyGemsVersion) >= Gem::Version.new('1.2.0') then
-    else
-    end
-  else
-  end
-end