diff --git a/src/ncc/CLI/Commands/BuildCommand.php b/src/ncc/CLI/Commands/BuildCommand.php
index f2bff4f..c9978cd 100644
--- a/src/ncc/CLI/Commands/BuildCommand.php
+++ b/src/ncc/CLI/Commands/BuildCommand.php
@@ -92,7 +92,7 @@
             // Build the project
             try
             {
-                $build_configuration = $args['config'] ?? $args['c'] ?? BuildConfigurationValues::DEFAULT;
+                $build_configuration = $args['config'] ?? $args['c'] ?? BuildConfigurationValues::DEFAULT->value;
                 $output = $project_manager->build($build_configuration, $options);
             }
             catch (Exception $e)
diff --git a/src/ncc/Classes/NccExtension/NccCompiler.php b/src/ncc/Classes/NccExtension/NccCompiler.php
index 9d66699..2b152e5 100644
--- a/src/ncc/Classes/NccExtension/NccCompiler.php
+++ b/src/ncc/Classes/NccExtension/NccCompiler.php
@@ -87,7 +87,8 @@
          * @throws PathNotFoundException
          * @noinspection UnusedFunctionResultInspection
          */
-        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT, array $options=[]): string
+        // TODO: $build_configuration could use enum case
+        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT->value, array $options=[]): string
         {
             $configuration = $this->project_manager->getProjectConfiguration()->getBuild()->getBuildConfiguration($build_configuration);
             $configuration->setOptions(array_merge($configuration->getOptions(), $options));
@@ -327,7 +328,8 @@
          * @param string $build_configuration
          * @return void
          */
-        public function processMetadata(PackageWriter $package_writer, string $build_configuration=BuildConfigurationValues::DEFAULT): void
+        // TODO: $build_configuration could use the enum case
+        public function processMetadata(PackageWriter $package_writer, string $build_configuration=BuildConfigurationValues::DEFAULT->value): void
         {
             $metadata = new Metadata($this->project_manager->getProjectConfiguration()->getProject()->getCompiler());
 
diff --git a/src/ncc/Classes/PhpExtension/ExecutableCompiler.php b/src/ncc/Classes/PhpExtension/ExecutableCompiler.php
index 3b788dc..4fa9f46 100644
--- a/src/ncc/Classes/PhpExtension/ExecutableCompiler.php
+++ b/src/ncc/Classes/PhpExtension/ExecutableCompiler.php
@@ -41,7 +41,7 @@
          * @inheritDoc
          * @throws BuildException
          */
-        public function build(string $build_configuration = BuildConfigurationValues::DEFAULT, array $options=[]): string
+        public function build(string $build_configuration = BuildConfigurationValues::DEFAULT->value, array $options=[]): string
         {
             $configuration = $this->getProjectManager()->getProjectConfiguration()->getBuild()->getBuildConfiguration($build_configuration);
 
diff --git a/src/ncc/Enums/Options/BuildConfigurationValues.php b/src/ncc/Enums/Options/BuildConfigurationValues.php
index 9454e26..7311b25 100644
--- a/src/ncc/Enums/Options/BuildConfigurationValues.php
+++ b/src/ncc/Enums/Options/BuildConfigurationValues.php
@@ -22,9 +22,9 @@
 
     namespace ncc\Enums\Options;
 
-    final class BuildConfigurationValues
+    enum BuildConfigurationValues : string
     {
-        public const DEFAULT = 'default';
+        case DEFAULT = 'default';
 
-        public const ALL = 'all';
+        case ALL = 'all';
     }
\ No newline at end of file
diff --git a/src/ncc/Interfaces/CompilerInterface.php b/src/ncc/Interfaces/CompilerInterface.php
index a34589a..8225603 100644
--- a/src/ncc/Interfaces/CompilerInterface.php
+++ b/src/ncc/Interfaces/CompilerInterface.php
@@ -41,5 +41,6 @@
          * @param array $options Optional. The options to use/override for this build
          * @return string
          */
-        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT, array $options=[]): string;
+        // TODO: $build_configuration could use the enum case directly
+        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT->value, array $options=[]): string;
     }
\ No newline at end of file
diff --git a/src/ncc/Managers/PackageManager.php b/src/ncc/Managers/PackageManager.php
index 7636d77..dacade0 100644
--- a/src/ncc/Managers/PackageManager.php
+++ b/src/ncc/Managers/PackageManager.php
@@ -805,7 +805,7 @@
                     try
                     {
                         $package_path = (new ProjectManager($project_detection->getProjectFilePath()))->build(
-                            BuildConfigurationValues::DEFAULT,
+                            BuildConfigurationValues::DEFAULT->value,
                             [BuildConfigurationOptions::OUTPUT_FILE => PathFinder::getCachePath() . DIRECTORY_SEPARATOR . hash('sha1', $archive) . '.ncc']
                         );
 
@@ -829,7 +829,7 @@
                     {
                         $project_manager = ProjectManager::initializeFromComposer(dirname($project_detection->getProjectFilePath()), $options);
                         $package_path = $project_manager->build(
-                            BuildConfigurationValues::DEFAULT,
+                            BuildConfigurationValues::DEFAULT->value,
                             [BuildConfigurationOptions::OUTPUT_FILE => PathFinder::getCachePath() . DIRECTORY_SEPARATOR . hash('sha1', $archive) . '.ncc']
                         );
 
diff --git a/src/ncc/Managers/ProjectManager.php b/src/ncc/Managers/ProjectManager.php
index dca3b4a..484eb05 100644
--- a/src/ncc/Managers/ProjectManager.php
+++ b/src/ncc/Managers/ProjectManager.php
@@ -154,7 +154,7 @@
          * @throws NotSupportedException
          * @throws PathNotFoundException
          */
-        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT, array $options=[]): string
+        public function build(string $build_configuration=BuildConfigurationValues::DEFAULT->value, array $options=[]): string
         {
             $configuration = $this->project_configuration->getBuild()->getBuildConfiguration($build_configuration);
 
@@ -275,7 +275,7 @@
          * @throws IOException
          * @throws PathNotFoundException
          */
-        public function getExecutionUnits(string $build_configuration=BuildConfigurationValues::DEFAULT): array
+        public function getExecutionUnits(string $build_configuration=BuildConfigurationValues::DEFAULT->value): array
         {
             $execution_units = [];
 
@@ -301,7 +301,7 @@
          * @return array
          * @throws NotSupportedException
          */
-        public function getComponents(string $build_configuration=BuildConfigurationValues::DEFAULT): array
+        public function getComponents(string $build_configuration=BuildConfigurationValues::DEFAULT->value): array
         {
             $configuration = $this->project_configuration->getBuild()->getBuildConfiguration($build_configuration);
 
@@ -317,7 +317,7 @@
          * @return array
          * @throws NotSupportedException
          */
-        public function getResources(string $build_configuration=BuildConfigurationValues::DEFAULT): array
+        public function getResources(string $build_configuration=BuildConfigurationValues::DEFAULT->value): array
         {
             $configuration = $this->project_configuration->getBuild()->getBuildConfiguration($build_configuration);
 
@@ -334,7 +334,7 @@
          * @param string $build_configuration
          * @return array
          */
-        public function getRuntimeConstants(string $build_configuration=BuildConfigurationValues::DEFAULT): array
+        public function getRuntimeConstants(string $build_configuration=BuildConfigurationValues::DEFAULT->value): array
         {
             $configuration = $this->project_configuration->getBuild()->getBuildConfiguration($build_configuration);
 
diff --git a/src/ncc/Objects/ProjectConfiguration.php b/src/ncc/Objects/ProjectConfiguration.php
index d4121ae..882b621 100644
--- a/src/ncc/Objects/ProjectConfiguration.php
+++ b/src/ncc/Objects/ProjectConfiguration.php
@@ -206,7 +206,7 @@
          * @return string[]
          * @throws ConfigurationException
          */
-        public function getRequiredExecutionPolicies(string $build_configuration=BuildConfigurationValues::DEFAULT): array
+        public function getRequiredExecutionPolicies(string $build_configuration=BuildConfigurationValues::DEFAULT->value): array
         {
             if(count($this->execution_policies) === 0)
             {
@@ -287,7 +287,7 @@
                 }
             }
 
-            if($build_configuration === BuildConfigurationValues::ALL)
+            if($build_configuration === BuildConfigurationValues::ALL->value)
             {
                 /** @var BuildConfiguration $configuration */
                 foreach($this->build->getBuildConfigurations() as $configuration)
@@ -424,7 +424,7 @@
                     throw new ConfigurationException(sprintf('Build configuration build.main points to a undefined execution policy "%s"', $this->build->getMain()));
                 }
 
-                if($this->build->getMain() === BuildConfigurationValues::ALL)
+                if($this->build->getMain() === BuildConfigurationValues::ALL->value)
                 {
                     throw new ConfigurationException(sprintf('Build configuration build.main cannot be set to "%s"', BuildConfigurationValues::ALL));
                 }
diff --git a/src/ncc/Objects/ProjectConfiguration/Build.php b/src/ncc/Objects/ProjectConfiguration/Build.php
index 82472ae..577d7b7 100644
--- a/src/ncc/Objects/ProjectConfiguration/Build.php
+++ b/src/ncc/Objects/ProjectConfiguration/Build.php
@@ -115,7 +115,7 @@
         public function __construct(string $source_path, ?string $default_configuration=null)
         {
             $this->source_path = $source_path;
-            $this->default_configuration = $default_configuration ?? BuildConfigurationValues::DEFAULT;
+            $this->default_configuration = $default_configuration ?? BuildConfigurationValues::DEFAULT->value;
             $this->exclude_files = [];
             $this->options = [];
             $this->define_constants = [];
@@ -484,7 +484,7 @@
          */
         public function getBuildConfiguration(string $name): BuildConfiguration
         {
-            if($name === BuildConfigurationValues::DEFAULT)
+            if($name === BuildConfigurationValues::DEFAULT->value)
             {
                 $name = $this->default_configuration;
             }