diff --git a/src/Box.php b/src/Box.php
index 04581a4d0..39d3fb747 100644
--- a/src/Box.php
+++ b/src/Box.php
@@ -70,6 +70,7 @@ final class Box implements Countable
     private function __construct(
         private Phar $phar,
         private readonly string $pharFilePath,
+        private readonly bool $enableParallelization,
     ) {
         $this->compactors = new Compactors();
         $this->placeholderCompactor = new Placeholder([]);
@@ -86,8 +87,12 @@ private function __construct(
      *
      * @see RecursiveDirectoryIterator
      */
-    public static function create(string $pharFilePath, int $pharFlags = 0, ?string $pharAlias = null): self
-    {
+    public static function create(
+        string $pharFilePath,
+        int $pharFlags = 0,
+        ?string $pharAlias = null,
+        bool $enableParallelization = false,
+    ): self {
         // Ensure the parent directory of the PHAR file exists as `new \Phar()` does not create it and would fail
         // otherwise.
         FS::mkdir(dirname($pharFilePath));
@@ -95,6 +100,7 @@ public static function create(string $pharFilePath, int $pharFlags = 0, ?string
         return new self(
             new Phar($pharFilePath, $pharFlags, $pharAlias),
             $pharFilePath,
+            $enableParallelization,
         );
     }
 
@@ -450,14 +456,15 @@ private function processContents(array $files): array
         $mapFile = $this->mapFile;
         $compactors = $this->compactors;
         $cwd = getcwd();
+        $enableParallelization = $this->enableParallelization;
 
-        $processFile = static function (string $file) use ($cwd, $mapFile, $compactors): array {
+        $processFile = static function (string $file) use ($cwd, $mapFile, $compactors, $enableParallelization): array {
             chdir($cwd);
 
             // Keep the fully qualified call here since this function may be executed without the right autoloading
             // mechanism
             \KevinGH\Box\register_aliases();
-            if (true === \KevinGH\Box\is_parallel_processing_enabled()) {
+            if ($enableParallelization) {
                 \KevinGH\Box\register_error_handler();
             }
 
@@ -470,7 +477,7 @@ private function processContents(array $files): array
             return [$local, $processedContents, $compactors->getScoperSymbolsRegistry()];
         };
 
-        if ($this->scoper instanceof NullScoper || false === is_parallel_processing_enabled()) {
+        if ($this->scoper instanceof NullScoper || !$enableParallelization) {
             return array_map($processFile, $files);
         }
 
diff --git a/src/Console/Command/Compile.php b/src/Console/Command/Compile.php
index 871b8f32a..11c817eb9 100644
--- a/src/Console/Command/Compile.php
+++ b/src/Console/Command/Compile.php
@@ -64,7 +64,6 @@
 use function implode;
 use function is_callable;
 use function is_string;
-use function KevinGH\Box\disable_parallel_processing;
 use function KevinGH\Box\format_size;
 use function KevinGH\Box\format_time;
 use function memory_get_peak_usage;
@@ -192,8 +191,9 @@ public function execute(IO $io): int
 
         PhpSettingsChecker::check($io);
 
-        if ($io->getTypedOption(self::NO_PARALLEL_PROCESSING_OPTION)->asBoolean()) {
-            disable_parallel_processing();
+        $enableParallelization = $io->getTypedOption(self::NO_PARALLEL_PROCESSING_OPTION)->asBoolean();
+
+        if ($enableParallelization) {
             $io->writeln(
                 '<info>[debug] Disabled parallel processing</info>',
                 OutputInterface::VERBOSITY_DEBUG,
@@ -224,7 +224,7 @@ public function execute(IO $io): int
         $restoreLimit = OpenFileDescriptorLimiter::bumpLimit(2048, $io);
 
         try {
-            $box = $this->createPhar($config, $logger, $io, $debug);
+            $box = $this->createPhar($config, $logger, $io, $debug, $enableParallelization);
         } finally {
             $restoreLimit();
         }
@@ -244,10 +244,11 @@ private function createPhar(
         Configuration $config,
         CompilerLogger $logger,
         IO $io,
+        bool $enableParallelization,
         bool $debug,
     ): Box {
         $tmpOutputPath = $config->getTmpOutputPath();
-        $box = Box::create($tmpOutputPath);
+        $box = Box::create($tmpOutputPath, enableParallelization: $enableParallelization);
         $composerOrchestrator = new ComposerOrchestrator(
             ComposerProcessFactory::create(
                 $config->getComposerBin(),
diff --git a/src/Constants.php b/src/Constants.php
index 036758689..8fa753326 100644
--- a/src/Constants.php
+++ b/src/Constants.php
@@ -21,7 +21,4 @@ final class Constants
     public const MEMORY_LIMIT = 'BOX_MEMORY_LIMIT';
     public const ALLOW_XDEBUG = 'BOX_ALLOW_XDEBUG';
     public const BIN = 'BOX_BIN';
-
-    /** @internal */
-    public const NO_PARALLEL_PROCESSING = '_BOX_NO_PARALLEL_PROCESSING';
 }
diff --git a/src/functions.php b/src/functions.php
index a328137e8..1ff33245f 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -22,9 +22,6 @@
 use function bin2hex;
 use function class_alias;
 use function class_exists;
-use function constant;
-use function define;
-use function defined;
 use function floor;
 use function is_float;
 use function is_int;
@@ -168,24 +165,6 @@ class_alias(\Symfony\Component\Finder\Finder::class, \Isolated\Symfony\Component
     }
 }
 
-/**
- * @private
- */
-function disable_parallel_processing(): void
-{
-    if (false === defined(Constants::NO_PARALLEL_PROCESSING)) {
-        define(Constants::NO_PARALLEL_PROCESSING, true);
-    }
-}
-
-/**
- * @private
- */
-function is_parallel_processing_enabled(): bool
-{
-    return false === defined(Constants::NO_PARALLEL_PROCESSING) || false === constant(Constants::NO_PARALLEL_PROCESSING);
-}
-
 /**
  * @private
  *