diff --git a/tasks/install.rake b/tasks/install.rake
index c83d30a4e..5ee6302ad 100644
--- a/tasks/install.rake
+++ b/tasks/install.rake
@@ -1,16 +1,8 @@
 desc "install compiled products"
 task :install => :install_bin do
   if host = MRuby.targets['host']
-    install_D host.libmruby_static, File.join(MRuby::INSTALL_PREFIX, "lib", File.basename(host.libmruby_static))
-    # install mruby.h and mrbconf.h
-    Dir.glob(File.join(MRUBY_ROOT, "include", "*.h")) do |src|
-      install_D src, File.join(MRuby::INSTALL_PREFIX, "include", File.basename(src))
-    end
-    Dir.glob(File.join(MRUBY_ROOT, "include", "mruby", "*.h")) do |src|
-      install_D src, File.join(MRuby::INSTALL_PREFIX, "include", "mruby", File.basename(src))
-    end
-    Dir.glob(File.join(File.join(MRUBY_ROOT, "build", "host", "include", "mruby", "presym", "*.h"))) do |src|
-      install_D src, File.join(MRuby::INSTALL_PREFIX, "include", "mruby", "presym", File.basename(src))
+    Dir.glob(File.join(host.build_dir, "{include,lib}/**/*")) do |path|
+      install_D path, File.join(MRuby::INSTALL_PREFIX, path.relative_path_from(host.build_dir)) if File.file? path
     end
   end
 end
@@ -18,8 +10,8 @@ end
 desc "install compiled executable (on host)"
 task :install_bin => :all do
   if host = MRuby.targets['host']
-    Dir.glob(File.join(MRUBY_ROOT, "bin", "*")) do |src|
-      install_D src, File.join(MRuby::INSTALL_PREFIX, "bin", File.basename(src))
+    Dir.glob(File.join(host.build_dir, "bin/**/*")) do |path|
+      install_D path, File.join(MRuby::INSTALL_PREFIX, path.relative_path_from(host.build_dir)) if File.file? path
     end
   end
 end