diff --git a/bhl.inc.php b/bhl.inc.php
index 27fc36a..36a1c23 100644
--- a/bhl.inc.php
+++ b/bhl.inc.php
@@ -12,6 +12,10 @@ task('bhl_clean_cache', function()
   bhl_clean_cache();
 });
 
+task('bhl_make_upm_package', function() {
+  bhl_make_upm_package();
+});
+
 function bhl_proj_file()
 {
   return get('BHL_PROJ_FILE');
@@ -246,3 +250,61 @@ function bhl_validate_func_ref($module, $func, array $signature)
   if(!preg_match($signature_pattern, $module_src))
     throw new Exception("Func '$func' signature '".implode(',', $signature)."' not found in module '$module'");
 }
+
+function bhl_upm_path()
+{
+  global $GAME_ROOT;
+  $pkg_dir = get("UNITY_ASSETS_DIR") . '/../Packages/bhl';
+  return $pkg_dir;
+}
+
+function bhl_clean_upm_package()
+{
+  ensure_rm(bhl_upm_path() . '/Runtime/code/');
+}
+
+function bhl_make_upm_package()
+{
+  global $GAME_ROOT;
+
+  $pkg_dir = bhl_upm_path();
+  ensure_mkdir($pkg_dir);
+
+  $srcs = array();
+  $lines = file(bhl_dir() . '/bhl.cs');
+  $started = false;
+  foreach($lines as $line)
+  {
+    if(!$started && strpos($line, 'static readonly string[] VM_SRC = new string[] {') !== false)
+    {
+      $started = true;
+      continue;
+    }
+    else if($started && strpos($line, '};') !== false) 
+      break;
+    else if($started)
+    {
+      $mask = trim($line);
+      $mask = str_replace('$"{BHL_ROOT}/', '', $mask);
+      $mask = str_replace('",', '', $mask);
+      $srcs = array_merge($srcs, glob(bhl_dir() . '/' . $mask));
+    }
+  }
+
+  $trgs = array();
+  $changed = false;
+  foreach($srcs as $src)
+  {
+    $trg = $pkg_dir . '/Runtime/code/' . str_replace(bhl_dir(), '', $src);
+    if(!is_file($trg) || file_get_contents($src) != file_get_contents($trg))
+      $changed = true;
+    $trgs[$src] = $trg;
+  }
+
+  if($changed)
+  {
+    bhl_clean_upm_package();
+    foreach($trgs as $src => $trg)
+      ensure_copy($src, $trg);
+  }
+}