diff --git a/Twig/Gettext/Extractor.php b/Twig/Gettext/Extractor.php
index e7fa1af..1feb75e 100644
--- a/Twig/Gettext/Extractor.php
+++ b/Twig/Gettext/Extractor.php
@@ -32,6 +32,12 @@ class Extractor
      */
     protected $templates;
 
+    /**
+     * xgettext command like in terminal
+     * @var string
+     */
+    protected $command;
+
     /**
      * Gettext parameters.
      *
@@ -57,6 +63,11 @@ public function addTemplate($path)
         $this->templates[] = $this->environment->getCacheFilename($path);
     }
 
+    public function setGettextCommand($command = "xgettext")
+    {
+        $this->command = $command;
+    }
+
     public function addGettextParameter($parameter)
     {
         $this->parameters[] = $parameter;
@@ -69,16 +80,21 @@ public function setGettextParameters(array $parameters)
 
     public function extract()
     {
-        $command = 'xgettext';
-        $command .= ' '.join(' ', $this->parameters);
-        $command .= ' '.join(' ', $this->templates);
-
+        # Generate xgettext path with params (XGETTEXT_PATH defined in twig-gettext-extractor file)
+        $this->command .= ' '.join(' ', $this->parameters);
+        $this->command .= ' '.join(' ', $this->templates);
+        
         $error = 0;
-        $output = system($command, $error);
+
+        # Attention, if you have problems with function system() 
+        # You can try turn off safe_mode in php.ini and if it not help
+        # try to use full path to xgettext command (like: "/usr/bin/ls")
+        $output = system($this->command, $error);
+
         if (0 !== $error) {
             throw new \RuntimeException(sprintf(
                 'Gettext command "%s" failed with error code %s and output: %s',
-                $command,
+                $this->command,
                 $error,
                 $output
             ));
diff --git a/composer.phar b/composer.phar
new file mode 100755
index 0000000..415cf0a
Binary files /dev/null and b/composer.phar differ
diff --git a/twig-gettext-extractor b/twig-gettext-extractor
index 6cc97c1..d6010d9 100755
--- a/twig-gettext-extractor
+++ b/twig-gettext-extractor
@@ -1,6 +1,5 @@
 #!/usr/bin/env php
 <?php
-
 /**
  * This file is part of the Twig Gettext utility.
  *
@@ -55,4 +54,10 @@ foreach ($_SERVER['argv'] as $arg) {
     }
 }
 
+# Default value for path it's "xgettext".
+# If you have problems with it on Linux or OS X, you can try to 
+# use command [$ which xgettext] in terminal and copy full path to xgettext here.
+# For example for in OS X it's look like "/opt/local/bin/xgettext"
+$extractor->setGettextCommand("xgettext");
+
 $extractor->extract();