diff --git a/.travis.yml b/.travis.yml
index 86f87b0..cf085fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ before_install:
 rvm:
 - 2.1.0
 script:
-- bundle exec rake
+- bundle exec rake checks
 notifications:
   email:
     recipients:
diff --git a/Rakefile b/Rakefile
index 4254421..3c6c2ea 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,21 @@
+require "bundler/gem_tasks"
 require "rubocop/rake_task"
 require "rspec/core/rake_task"
+require "pathname"
+require "fileutils"
 
 RuboCop::RakeTask.new
 RSpec::Core::RakeTask.new(:rspec)
 
-task default: [:rubocop, :rspec]
+task :create_man do |_t|
+  os_prefix = "/usr/local"
+  man_prefix = Pathname("#{os_prefix}/share/man/man1")
+  man_pages = "man/git-*"
+
+  Pathname.glob(man_pages) do |path|
+    FileUtils.cp(path, man_prefix + path.basename)
+  end
+end
+
+task checks: [:rubocop, :rspec]
+task default: [:checks, :create_man]
diff --git a/ext/mkrf_conf.rb b/ext/mkrf_conf.rb
deleted file mode 100644
index 60e36a3..0000000
--- a/ext/mkrf_conf.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-PREFIX = "/usr/local"
-MANPREFIX = "#{PREFIX}/share/man/man1"
-MAN_PAGES = "man/git-*"
-
-require "fileutils"
-
-Dir.glob(MAN_PAGES).each do |f|
-  filename = File.basename(f)
-  FileUtils.cp(f, "#{MANPREFIX}/#{filename}")
-end
diff --git a/github_changelog_generator.gemspec b/github_changelog_generator.gemspec
index f4b44cf..b110954 100644
--- a/github_changelog_generator.gemspec
+++ b/github_changelog_generator.gemspec
@@ -16,8 +16,8 @@ Gem::Specification.new do |spec|
   spec.summary = "Script, that automatically generate changelog from your tags, issues, labels and pull requests."
   spec.description = "Changelog generation has never been so easy. Fully automate changelog generation - this gem generate change log file based on tags, issues and merged pull requests from Github issue tracker."
   spec.homepage = "https://github.com/skywinder/Github-Changelog-Generator"
-  spec.license       = "MIT"
-  spec.extensions  = "ext/mkrf_conf.rb"
+  spec.license = "MIT"
+  spec.extensions = ["Rakefile"]
 
   spec.files = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }