diff --git a/src/ncc/Abstracts/CompilerExtensionDefaultVersions.php b/src/ncc/Abstracts/CompilerExtensionDefaultVersions.php
new file mode 100644
index 0000000..e590c70
--- /dev/null
+++ b/src/ncc/Abstracts/CompilerExtensionDefaultVersions.php
@@ -0,0 +1,13 @@
+<?php
+
+    namespace ncc\Abstracts;
+
+    abstract class CompilerExtensionDefaultVersions
+    {
+        // ----------------------------------------------------------------
+        // [0] = MinimumVersion
+        // [1] = MaximumVersion
+        // ----------------------------------------------------------------
+
+        const PHP = ['8.0', '8.1'];
+    }
\ No newline at end of file
diff --git a/src/ncc/Abstracts/CompilerExtensionSupportedVersions.php b/src/ncc/Abstracts/CompilerExtensionSupportedVersions.php
new file mode 100644
index 0000000..5e04bc4
--- /dev/null
+++ b/src/ncc/Abstracts/CompilerExtensionSupportedVersions.php
@@ -0,0 +1,8 @@
+<?php
+
+    namespace ncc\Abstracts;
+
+    abstract class CompilerExtensionSupportedVersions
+    {
+        const PHP = ['8.0', '8.1'];
+    }
\ No newline at end of file
diff --git a/src/ncc/Abstracts/CompilerExtensions.php b/src/ncc/Abstracts/CompilerExtensions.php
new file mode 100644
index 0000000..550e71c
--- /dev/null
+++ b/src/ncc/Abstracts/CompilerExtensions.php
@@ -0,0 +1,12 @@
+<?php
+
+    namespace ncc\Abstracts;
+
+    abstract class CompilerExtensions
+    {
+        const PHP = 'php';
+
+        const All = [
+            CompilerExtensions::PHP
+        ];
+    }
\ No newline at end of file
diff --git a/src/ncc/CLI/Main.php b/src/ncc/CLI/Main.php
index 0f61272..ce9c2d1 100644
--- a/src/ncc/CLI/Main.php
+++ b/src/ncc/CLI/Main.php
@@ -58,6 +58,10 @@
                             ProjectMenu::start($args);
                             exit(0);
 
+                        case 'build':
+                            BuildMenu::start($args);
+                            exit(0);
+
                         case 'credential':
                             CredentialMenu::start($args);
                             exit(0);
diff --git a/src/ncc/CLI/ProjectMenu.php b/src/ncc/CLI/ProjectMenu.php
index 43144a4..d735cc6 100644
--- a/src/ncc/CLI/ProjectMenu.php
+++ b/src/ncc/CLI/ProjectMenu.php
@@ -3,6 +3,9 @@
     namespace ncc\CLI;
 
     use Exception;
+    use ncc\Abstracts\CompilerExtensionDefaultVersions;
+    use ncc\Abstracts\CompilerExtensions;
+    use ncc\Abstracts\CompilerExtensionSupportedVersions;
     use ncc\Exceptions\InvalidPackageNameException;
     use ncc\Exceptions\InvalidProjectNameException;
     use ncc\Exceptions\ProjectAlreadyExistsException;
@@ -73,15 +76,103 @@
 
             // Fetch the rest of the information needed for the project
             //$compiler_extension = Console::getOptionInput($args, 'ce', 'Compiler Extension (php, java): ');
-            $compiler_extension = 'php'; // Always php, for now.
             $package_name = Console::getOptionInput($args, 'package', 'Package Name (com.example.foo): ');
             $project_name = Console::getOptionInput($args, 'name', 'Project Name (Foo Bar Library): ');
-
-            // Create the compiler configuration
             $Compiler = new Compiler();
-            $Compiler->Extension = $compiler_extension;
-            $Compiler->MaximumVersion = '8.1';
-            $Compiler->MinimumVersion = '7.4';
+
+            // Detect the specified compiler extension
+            if(isset($args['ext']) || isset($args['extension']))
+            {
+                $compiler_extension = strtolower(($args['extension'] ?? $args['ext']));
+
+                if(in_array($compiler_extension, CompilerExtensions::All))
+                {
+                    $Compiler->Extension = $compiler_extension;
+                }
+                else
+                {
+                    Console::outError('Unsupported extension: ' . $compiler_extension, true, 1);
+                    return;
+                }
+            }
+            else
+            {
+                // Default PHP Extension
+                $Compiler->Extension = CompilerExtensions::PHP;
+            }
+
+            // If a minimum and maximum version is specified
+            if(
+                (isset($args['max-version']) || isset($args['max-ver'])) &&
+                (isset($args['min-version']) || isset($args['min-ver']))
+            )
+            {
+                $max_version = strtolower($args['max-version'] ?? $args['max-ver']);
+                $min_version = strtolower($args['min-version'] ?? $args['min-ver']);
+
+                switch($Compiler->Extension)
+                {
+                    case CompilerExtensions::PHP:
+
+                        if(!in_array($max_version, CompilerExtensionSupportedVersions::PHP))
+                        {
+                            Console::outError('The extension \'' . $Compiler->Extension . '\' does not support version ' . $max_version, true, 1);
+                            return;
+                        }
+                        if(!in_array($min_version, CompilerExtensionSupportedVersions::PHP))
+                        {
+                            Console::outError('The extension \'' . $Compiler->Extension . '\' does not support version ' . $min_version, true, 1);
+                            return;
+                        }
+
+                        $Compiler->MaximumVersion = $max_version;
+                        $Compiler->MinimumVersion = $min_version;
+
+                        break;
+
+                    default:
+                        Console::outError('Unsupported extension: ' . $Compiler->Extension, true, 1);
+                        return;
+                }
+            }
+            // If a single version is specified
+            elseif(isset($args['version']) || isset($args['ver']))
+            {
+                $version = strtolower($args['version'] ?? $args['ver']);
+                switch($Compiler->Extension)
+                {
+                    case CompilerExtensions::PHP:
+                        if(!in_array($version, CompilerExtensionSupportedVersions::PHP))
+                        {
+                            Console::outError('The extension \'' . $Compiler->Extension . '\' does not support version ' . $version, true, 1);
+                            return;
+                        }
+
+                        $Compiler->MaximumVersion = $version;
+                        $Compiler->MinimumVersion = $version;
+
+                        break;
+
+                    default:
+                        Console::outError('Unsupported extension: ' . $Compiler->Extension, true, 1);
+                        return;
+                }
+            }
+            // If no version is specified, use the default version
+            else
+            {
+                switch($Compiler->Extension)
+                {
+                    case CompilerExtensions::PHP:
+                        $Compiler->MinimumVersion = CompilerExtensionDefaultVersions::PHP[1];
+                        $Compiler->MaximumVersion = CompilerExtensionDefaultVersions::PHP[0];
+                        break;
+
+                    default:
+                        Console::outError('Unsupported extension: ' . $Compiler->Extension, true, 1);
+                        return;
+                }
+            }
 
             // Now create the project
             $ProjectManager = new ProjectManager($current_directory);
@@ -93,18 +184,22 @@
             catch (InvalidPackageNameException $e)
             {
                 Console::outException('The given package name is invalid, the value must follow the standard package naming convention', $e, 1);
+                return;
             }
             catch (InvalidProjectNameException $e)
             {
                 Console::outException('The given project name is invalid, cannot be empty or larger than 126 characters', $e, 1);
+                return;
             }
             catch (ProjectAlreadyExistsException $e)
             {
                 Console::outException('A project has already been initialized in \'' . $current_directory . '\'', $e, 1);
+                return;
             }
             catch(Exception $e)
             {
                 Console::outException('There was an unexpected error while trying to initialize the project', $e, 1);
+                return;
             }
 
             Console::out('Project successfully created');
@@ -121,7 +216,9 @@
             $options = [
                 new CliHelpSection(['help'], 'Displays this help menu about the value command'),
                 new CliHelpSection(['create', '--src', '--package', '--name'], 'Creates a new NCC project'),
-                new CliHelpSection(['create', '--makefile'], 'Generates a Makefile for the project'),
+                new CliHelpSection(['create', '--ext'], 'Specifies the compiler extension'),
+                new CliHelpSection(['create', '--min-version', '--min-ver', '--maximum-ver', '-max-ver'], 'Specifies the compiler extension version'),
+                new CliHelpSection(['create-makefile'], 'Generates a Makefile for the project'),
             ];
 
             $options_padding = \ncc\Utilities\Functions::detectParametersPadding($options) + 4;