diff --git a/app/Console/Commands/Test.php b/app/Console/Commands/Test.php
index 021073f4..2f0a00f2 100644
--- a/app/Console/Commands/Test.php
+++ b/app/Console/Commands/Test.php
@@ -97,9 +97,8 @@ class Test extends Command
      */
     public function handle()
     {
-        $r = executeCommand("php -m");
-        $r = preg_split("/[\r\n]+/", $r);
-        dd($r);
+        $r = executeCommand("php -r 'var_export(function_exists(\"pcntl_alarm\"));'");
+        dd($r == 'true');
     }
 
 }
diff --git a/nexus/Install/Install.php b/nexus/Install/Install.php
index e3c6c00e..aff66e5a 100644
--- a/nexus/Install/Install.php
+++ b/nexus/Install/Install.php
@@ -38,7 +38,7 @@ class Install
     ];
     protected array $requiredFunctions = [
         'symlink', 'putenv', 'proc_open', 'proc_get_status', 'exec',
-//        'pcntl_signal', 'pcntl_alarm', 'pcntl_async_signals'
+        'pcntl_signal', 'pcntl_alarm', 'pcntl_async_signals'
     ];
 
     protected string $lockFile = 'install.lock';
@@ -168,7 +168,13 @@ class Install
 
         $disabledFunctions = [];
         foreach ($this->requiredFunctions as $fn) {
-            if (!function_exists($fn)) {
+            if (str_starts_with($fn, "pcntl_")) {
+                $phpPath = nexus_env('PHP_PATH') ?: 'php';
+                $exists = executeCommand("$phpPath -r 'var_export(function_exists(\"$fn\"));'") == 'true';
+                if (!$exists) {
+                    $disabledFunctions[] = $fn;
+                }
+            } elseif (!function_exists($fn)) {
                 $disabledFunctions[] = $fn;
             }
         }