diff --git a/src/Service/VersionService.php b/src/Service/VersionService.php
index b696709..34dad5d 100644
--- a/src/Service/VersionService.php
+++ b/src/Service/VersionService.php
@@ -81,7 +81,7 @@ public function createZipArchiveFromPath(string $path): string
                 if ($current->isDir()) {
                     // if $current is a directory, check for excluded directories
                     foreach ($this->excludeConfiguration['directories'] as $excludeDirectory) {
-                        if (preg_match('/^' . $excludeDirectory . '/i', $path)) {
+                        if (preg_match('/^' . preg_quote((string)$excludeDirectory, '/') . '/i', $path)) {
                             return false;
                         }
                     }
@@ -90,7 +90,7 @@ public function createZipArchiveFromPath(string $path): string
                 if ($current->isFile()) {
                     // if $current is a file, check for excluded files
                     foreach ($this->excludeConfiguration['files'] as $excludeFile) {
-                        if (preg_match('/' . $excludeFile . '$/i', $filename)) {
+                        if (preg_match('/' . preg_quote((string)$excludeFile, '/') . '$/i', $filename)) {
                             return false;
                         }
                     }
diff --git a/tests/Unit/Fixtures/ExcludeFromPackaging/config_nested_directory.php b/tests/Unit/Fixtures/ExcludeFromPackaging/config_nested_directory.php
new file mode 100644
index 0000000..c178dc3
--- /dev/null
+++ b/tests/Unit/Fixtures/ExcludeFromPackaging/config_nested_directory.php
@@ -0,0 +1,8 @@
+<?php
+
+return [
+    'directories' => [
+        'Resources/Private/Build',
+    ],
+    'files' => [],
+];
diff --git a/tests/Unit/Service/VersionServiceTest.php b/tests/Unit/Service/VersionServiceTest.php
index abf4cf5..ff21ce5 100644
--- a/tests/Unit/Service/VersionServiceTest.php
+++ b/tests/Unit/Service/VersionServiceTest.php
@@ -19,6 +19,9 @@
 
 class VersionServiceTest extends TestCase
 {
+    /** @var list<string> */
+    protected array $temporaryDirectories = [];
+
     #[Test]
     public function defaultExcludeFromPackagingConfigurationIsUsedOnNonExistingEnvVar(): void
     {
@@ -105,6 +108,81 @@ public function getVersionFilenameAsMd5Test(): void
         );
     }
 
+    #[Test]
+    public function excludedDirectoryContainingASlashIsNotPackaged(): void
+    {
+        unset($_ENV);
+        putenv('TYPO3_EXCLUDE_FROM_PACKAGING=' . __DIR__ . '/../Fixtures/ExcludeFromPackaging/config_nested_directory.php');
+
+        $extensionPath = $this->createExtensionDirectory();
+        $transactionPath = $this->createTemporaryDirectory();
+
+        $archivePath = (new VersionService('1.0.0', 'my_ext', $transactionPath))
+            ->createZipArchiveFromPath($extensionPath);
+
+        $archive = new \ZipArchive();
+        $archive->open($archivePath);
+        $packagedFiles = [];
+
+        for ($index = 0; $index < $archive->numFiles; $index++) {
+            $packagedFiles[] = $archive->getNameIndex($index);
+        }
+
+        $archive->close();
+
+        self::assertContains('ext_emconf.php', $packagedFiles);
+        self::assertNotContains('Resources/Private/Build/gulpfile.js', $packagedFiles);
+    }
+
+    /**
+     * Create an extension directory holding a valid ext_emconf.php and a file
+     * inside the nested directory the exclude configuration names.
+     */
+    protected function createExtensionDirectory(): string
+    {
+        $path = $this->createTemporaryDirectory();
+
+        file_put_contents(
+            $path . '/ext_emconf.php',
+            '<?php' . PHP_EOL
+            . '$EM_CONF[$_EXTKEY] = [\'version\' => \'1.0.0\', \'constraints\' => [\'depends\' => [\'typo3\' => \'13.4.0-13.4.99\']]];' . PHP_EOL
+        );
+
+        mkdir($path . '/Resources/Private/Build', 0777, true);
+        file_put_contents($path . '/Resources/Private/Build/gulpfile.js', '// build only');
+
+        return $path;
+    }
+
+    protected function createTemporaryDirectory(): string
+    {
+        $path = sys_get_temp_dir() . '/tailor-test-' . bin2hex(random_bytes(8));
+        mkdir($path, 0777, true);
+        $this->temporaryDirectories[] = $path;
+
+        return $path;
+    }
+
+    protected function tearDown(): void
+    {
+        foreach ($this->temporaryDirectories as $directory) {
+            $files = new \RecursiveIteratorIterator(
+                new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS),
+                \RecursiveIteratorIterator::CHILD_FIRST
+            );
+
+            foreach ($files as $file) {
+                $file->isDir() ? rmdir($file->getPathname()) : unlink($file->getPathname());
+            }
+
+            rmdir($directory);
+        }
+
+        $this->temporaryDirectories = [];
+
+        parent::tearDown();
+    }
+
     /**
      * Invoke a protected / private method from VersionService
      *