README.md in noise-ruby-0.6.0 vs README.md in noise-ruby-0.6.1

@@ -31,9 +31,17 @@
 
 In addition, libsodium is required.
 
     $ brew install libsodium
 
+or 
+
+    $ git clone https://github.com/jedisct1/libsodium
+    $ cd libsodium
+    $ ./autogen.sh
+    $ ./configure
+    $ make
+    $ sudo make install
 
 Add this line to your application's Gemfile:
 
 ```
 gem 'noise-ruby'