diff --git a/.gitignore b/.gitignore
index f502038..5dc0afa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,4 +18,7 @@ temp
 *.suo
 *.user
 *.userosscache
-*.sln.docstates
\ No newline at end of file
+*.sln.docstates
+/contrib/libconfig-ruby/Gemfile.lock
+/contrib/libconfig-ruby/lib/rconfig.so
+/contrib/libconfig-ruby/tmp/
diff --git a/contrib/libconfig-ruby/Gemfile b/contrib/libconfig-ruby/Gemfile
new file mode 100644
index 0000000..a55debd
--- /dev/null
+++ b/contrib/libconfig-ruby/Gemfile
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rake-compiler", "~> 1.3"
diff --git a/contrib/libconfig-ruby/Rakefile b/contrib/libconfig-ruby/Rakefile
index f1b7845..5c8dc0c 100644
--- a/contrib/libconfig-ruby/Rakefile
+++ b/contrib/libconfig-ruby/Rakefile
@@ -8,10 +8,17 @@ spec = Gem::Specification.new do |s|
   s.email = "whitequark@whitequark.ru"
   s.platform = Gem::Platform::RUBY
   s.summary = "libconfig bindings"
-  s.files = [ File.join('ext', 'extconf.rb'), File.join('ext', 'rconfig.c') ].to_a
+  s.files = [ File.join('ext', 'extconf.rb'), File.join('ext', 'rconfig.c') ]
   s.extensions = 'ext/extconf.rb'
 end
  
 Gem::PackageTask.new(spec) do |pkg|
 end
  
+require 'rake/extensiontask'
+
+task build: :compile
+
+Rake::ExtensionTask.new("rconfig") do |ext|
+  ext.ext_dir = 'ext'
+end