guides/user/Installation.md

 # Installation instructions
 
-## v0.4.1
+## v0.4.2
 
 Arachni will run in any *nix environment (including Cygwin for Windows users)
 that satisfies the following dependencies:
 
-* ruby1.9.2 (or higher)
+* ruby1.9.3
 * libsqlite3-devel
 * libsql3.0
 * libffi4
@@ -24,11 +24,13 @@ that satisfies the following dependencies:
 * libcurl-devel (< 4.29.0)
 * libcurl4 (< 4.29.0)
 * libyaml-devel
-* yaml
+* libyaml
 
 **Per-platform instructions:**
 
 * [*nix](#nix)
+    * [Build scripts](#nix-build-scripts)
+    * [Sourced based](#nix-source-based)
         * [Gem](#nix-gem)
         * [Source](#nix-source)
 * [Linux](#linux)
@@ -39,19 +41,28 @@ that satisfies the following dependencies:
 
 ## <a id="nix" href="#nix">*nix</a>
 
+### <a id="nix-build-scripts" href="#nix-build-scripts">Build scripts</a>
+
+You can use the project's [[ build-scripts | Development-environment]] to
+automatically setup a self-contained environment which will includes Arachni and
+all its dependencies.
+
+### <a id="nix-source-based" href="#nix-source-based">Source based</a>
+
 To work with the source or install the Gem you'll need the aforementioned dependencies.
 
 Users of Debian-based distributions can run the following to install them:
 
     sudo apt-get install build-essential libxml2-dev libxslt1-dev libcurl4-openssl-dev libsqlite3-dev libyaml-dev zlib1g-dev ruby1.9.1-dev ruby1.9.1
 
-### <a id="nix-gem" href="#nix-gem">Gem</a>
+
+#### <a id="nix-gem" href="#nix-gem">Gem</a>
 
 To install Arachni:
 
     gem install arachni # Use sudo if you get permission errors.
 
-### <a id="nix-source" href="#nix-source">Source</a>
+#### <a id="nix-source" href="#nix-source">Source</a>
 
 If you want to clone the repository and work with the source code then you'll need to run the following to install all gem dependencies and Arachni: