diff --git a/src/Compiler.php b/src/Compiler.php
index af27a3e2..aed40461 100644
--- a/src/Compiler.php
+++ b/src/Compiler.php
@@ -62,6 +62,12 @@ public function compile(AbstractModule $module, string $scriptDir): Scripts
         $compileVisitor = new CompileVisitor($container);
         $container->map(static function (DependencyInterface $dependency, string $key) use ($scripts, $compileVisitor): DependencyInterface {
             assert($dependency instanceof AcceptInterface);
+            if ($key === InstanceScript::RAY_DI_SCRIPT_DIR) {
+                $scripts->add($key, 'return __DIR__;');
+
+                return $dependency;
+            }
+
             $script = $dependency->accept($compileVisitor);
             assert(is_string($script));
             $scripts->add($key, $script);
diff --git a/src/InstanceScript.php b/src/InstanceScript.php
index 62469814..fd2f068b 100644
--- a/src/InstanceScript.php
+++ b/src/InstanceScript.php
@@ -32,6 +32,7 @@ final class InstanceScript
 {
     public const RAY_DI_INJECTOR_INTERFACE = 'Ray\Di\InjectorInterface-';
     public const RAY_DI_INJECTION_POINT_INTERFACE = 'Ray\Di\InjectionPointInterface-';
+    public const RAY_DI_SCRIPT_DIR = '-Ray\Di\Annotation\ScriptDir';
     public const COMMENT = '// prototype';
 
     /** @var array<mixed> */
@@ -57,6 +58,14 @@ public function __construct(Container $container)
     /** @param mixed $defaultValue */
     public function addArg(string $index, bool $isDefaultAvailable, $defaultValue, ReflectionParameter $parameter): void
     {
+        // The script dir is where the generated scripts live: resolve it at
+        // runtime, never bake the compile-time path.
+        if ($index === self::RAY_DI_SCRIPT_DIR) {
+            $this->args[] = '__DIR__';
+
+            return;
+        }
+
         if (! isset($this->container[$index])) {
             if ($isDefaultAvailable) {
                 $this->addInstanceArg($defaultValue);
diff --git a/tests/Fake/FakeScriptDirAopConsumer.php b/tests/Fake/FakeScriptDirAopConsumer.php
new file mode 100644
index 00000000..e1e6b3fe
--- /dev/null
+++ b/tests/Fake/FakeScriptDirAopConsumer.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\Annotation\ScriptDir;
+
+class FakeScriptDirAopConsumer implements FakeScriptDirConsumerInterface
+{
+    public function __construct(#[ScriptDir] private string $scriptDir)
+    {
+    }
+
+    public function getScriptDir(): string
+    {
+        return $this->scriptDir;
+    }
+}
diff --git a/tests/Fake/FakeScriptDirConstructorConsumer.php b/tests/Fake/FakeScriptDirConstructorConsumer.php
new file mode 100644
index 00000000..ad221db5
--- /dev/null
+++ b/tests/Fake/FakeScriptDirConstructorConsumer.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\Annotation\ScriptDir;
+
+class FakeScriptDirConstructorConsumer implements FakeScriptDirConsumerInterface
+{
+    public function __construct(#[ScriptDir] private string $scriptDir)
+    {
+    }
+
+    public function getScriptDir(): string
+    {
+        return $this->scriptDir;
+    }
+}
diff --git a/tests/Fake/FakeScriptDirConsumerInterface.php b/tests/Fake/FakeScriptDirConsumerInterface.php
new file mode 100644
index 00000000..bf84eb00
--- /dev/null
+++ b/tests/Fake/FakeScriptDirConsumerInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+interface FakeScriptDirConsumerInterface
+{
+    public function getScriptDir(): string;
+}
diff --git a/tests/Fake/FakeScriptDirModule.php b/tests/Fake/FakeScriptDirModule.php
new file mode 100644
index 00000000..0f7e9683
--- /dev/null
+++ b/tests/Fake/FakeScriptDirModule.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\AbstractModule;
+
+class FakeScriptDirModule extends AbstractModule
+{
+    protected function configure(): void
+    {
+        $this->bind(FakeScriptDirConsumerInterface::class)->annotatedWith('ctor')->to(FakeScriptDirConstructorConsumer::class);
+        $this->bind(FakeScriptDirConsumerInterface::class)->annotatedWith('setter')->to(FakeScriptDirSetterConsumer::class);
+        $this->bind(FakeScriptDirConsumerInterface::class)->annotatedWith('provider')->toProvider(FakeScriptDirProvider::class);
+        $this->bind(FakeScriptDirConsumerInterface::class)->annotatedWith('aop')->to(FakeScriptDirAopConsumer::class);
+        $this->bindInterceptor(
+            $this->matcher->subclassesOf(FakeScriptDirAopConsumer::class),
+            $this->matcher->any(),
+            [FakeInterceptor::class],
+        );
+    }
+}
diff --git a/tests/Fake/FakeScriptDirProvider.php b/tests/Fake/FakeScriptDirProvider.php
new file mode 100644
index 00000000..6afcf02d
--- /dev/null
+++ b/tests/Fake/FakeScriptDirProvider.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\Annotation\ScriptDir;
+use Ray\Di\ProviderInterface;
+
+/** @implements ProviderInterface<FakeScriptDirConsumerInterface> */
+class FakeScriptDirProvider implements ProviderInterface
+{
+    public function __construct(#[ScriptDir] private string $scriptDir)
+    {
+    }
+
+    public function get(): FakeScriptDirConsumerInterface
+    {
+        return new FakeScriptDirConstructorConsumer($this->scriptDir);
+    }
+}
diff --git a/tests/Fake/FakeScriptDirSetterConsumer.php b/tests/Fake/FakeScriptDirSetterConsumer.php
new file mode 100644
index 00000000..dcb0081d
--- /dev/null
+++ b/tests/Fake/FakeScriptDirSetterConsumer.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use Ray\Di\Annotation\ScriptDir;
+use Ray\Di\Di\Inject;
+
+class FakeScriptDirSetterConsumer implements FakeScriptDirConsumerInterface
+{
+    private string $scriptDir = '';
+
+    #[Inject]
+    public function setScriptDir(#[ScriptDir] string $scriptDir): void
+    {
+        $this->scriptDir = $scriptDir;
+    }
+
+    public function getScriptDir(): string
+    {
+        return $this->scriptDir;
+    }
+}
diff --git a/tests/ScriptDirRelocationTest.php b/tests/ScriptDirRelocationTest.php
new file mode 100644
index 00000000..48e2e390
--- /dev/null
+++ b/tests/ScriptDirRelocationTest.php
@@ -0,0 +1,152 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ray\Compiler;
+
+use FilesystemIterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use Ray\Di\Annotation\ScriptDir;
+use Ray\Di\InjectorInterface;
+use RecursiveDirectoryIterator;
+use RecursiveIteratorIterator;
+
+use function array_filter;
+use function array_values;
+use function assert;
+use function file_get_contents;
+use function implode;
+use function mkdir;
+use function preg_replace;
+use function realpath;
+use function rename;
+use function str_contains;
+use function str_ends_with;
+
+/**
+ * Compiled scripts must not bake the compile-time absolute path: everything
+ * needed to locate them is derivable from __DIR__ at require-time, so a
+ * compiled script directory can be moved after compilation.
+ */
+class ScriptDirRelocationTest extends TestCase
+{
+    public static function setUpBeforeClass(): void
+    {
+        deleteFiles(__DIR__ . '/tmp');
+    }
+
+    private string $buildDir;
+    private string $runtimeDir;
+
+    protected function setUp(): void
+    {
+        $case = $this->name() . '-' . preg_replace('/[^A-Za-z0-9_-]+/', '_', (string) $this->dataName());
+        $this->buildDir = __DIR__ . '/tmp/script-dir-relocation-' . $case . '-build';
+        $this->runtimeDir = __DIR__ . '/tmp/script-dir-relocation-' . $case . '-runtime';
+        @mkdir($this->buildDir, 0777, true);
+        (new Compiler())->compile(new FakeScriptDirModule(), $this->buildDir);
+    }
+
+    public function testGeneratedScriptDirScriptContainsNoBakedPath(): void
+    {
+        $script = file_get_contents($this->buildDir . '/-Ray_Di_Annotation_ScriptDir.php');
+        $this->assertSame("<?php\nreturn __DIR__;", $script);
+    }
+
+    /**
+     * CompilerModule also toInstance()-binds the unrelated Compile::class
+     * annotation (a bool) right next to ScriptDir. The __DIR__ special case
+     * in Compiler::compile()'s map() callback must match on the ScriptDir
+     * key only, not swallow this neighboring instance binding.
+     */
+    public function testCompileAnnotationInstanceBindingStillCompilesNormally(): void
+    {
+        $script = file_get_contents($this->buildDir . '/-Ray_Compiler_Annotation_Compile.php');
+        $this->assertSame("<?php\nreturn true;", $script);
+    }
+
+    public function testNoGeneratedScriptContainsTheCompileTimePath(): void
+    {
+        $phpFiles = $this->findGeneratedPhpFiles($this->buildDir);
+        $this->assertNotEmpty($phpFiles, 'expected at least one generated *.php script to be scanned');
+
+        // Collect every offender instead of asserting inside the loop, so a
+        // single run reports all leaking scripts, not just the first one.
+        $leaking = array_values(array_filter(
+            $phpFiles,
+            fn (string $path): bool => str_contains((string) file_get_contents($path), $this->buildDir),
+        ));
+
+        $this->assertSame([], $leaking, 'these generated scripts must not contain the compile-time path: ' . implode(', ', $leaking));
+    }
+
+    /** @return list<string> */
+    private function findGeneratedPhpFiles(string $dir): array
+    {
+        $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS));
+        $files = [];
+        foreach ($iterator as $file) {
+            $path = (string) $file;
+            if (str_ends_with($path, '.php')) {
+                $files[] = $path;
+            }
+        }
+
+        return $files;
+    }
+
+    /** @return array<string, array{0: string}> */
+    public static function provideBindingNames(): array
+    {
+        return [
+            'constructor injection' => ['ctor'],
+            'setter injection' => ['setter'],
+            'provider' => ['provider'],
+            'AOP-woven class' => ['aop'],
+        ];
+    }
+
+    #[DataProvider('provideBindingNames')]
+    public function testRelocatedBindingResolvesToTheRuntimeDir(string $bindingName): void
+    {
+        [$injector, $runtimeDir] = $this->relocateAndCreateInjector();
+
+        $instance = $injector->getInstance(FakeScriptDirConsumerInterface::class, $bindingName);
+        $this->assertInstanceOf(FakeScriptDirConsumerInterface::class, $instance);
+        $this->assertSame($runtimeDir, $instance->getScriptDir());
+    }
+
+    public function testRelocatedScriptDirInstanceBindingResolvesToTheRuntimeDir(): void
+    {
+        [$injector, $runtimeDir] = $this->relocateAndCreateInjector();
+
+        $scriptDir = $injector->getInstance('', ScriptDir::class);
+        $this->assertSame($runtimeDir, $scriptDir);
+    }
+
+    public function testRelocatedInjectorInterfaceBindingIsUsable(): void
+    {
+        [$injector, $runtimeDir] = $this->relocateAndCreateInjector();
+
+        $innerInjector = $injector->getInstance(InjectorInterface::class);
+        $this->assertInstanceOf(CompiledInjector::class, $innerInjector);
+
+        $instance = $innerInjector->getInstance(FakeScriptDirConsumerInterface::class, 'ctor');
+        $this->assertSame($runtimeDir, $instance->getScriptDir());
+    }
+
+    /** @return array{0: CompiledInjector, 1: string} */
+    private function relocateAndCreateInjector(): array
+    {
+        $this->assertTrue(rename($this->buildDir, $this->runtimeDir), 'failed to relocate the compiled script dir');
+
+        $runtimeDir = $this->runtimeDir;
+        assert($runtimeDir !== '');
+
+        $realRuntimeDir = realpath($runtimeDir);
+        $this->assertIsString($realRuntimeDir);
+
+        return [new CompiledInjector($runtimeDir), $realRuntimeDir];
+    }
+}