diff --git a/build/builder/build-server.py b/build/builder/build-server.py
index ff0d1eb..da7a4b2 100644
--- a/build/builder/build-server.py
+++ b/build/builder/build-server.py
@@ -7,7 +7,6 @@ from core.env import env
 
 ctx = BuildContext()
 with_rdp = os.path.exists(os.path.join(env.root_path, 'server', 'tp_core', 'protocol', 'rdp'))
-with_telnet = os.path.exists(os.path.join(env.root_path, 'server', 'tp_core', 'protocol', 'telnet'))
 
 
 class BuilderBase:
@@ -70,9 +69,9 @@ class BuilderLinux(BuilderBase):
 
         out_path = os.path.join(env.root_path, 'out', 'server', ctx.bits_path, 'bin')
         out_files = [os.path.join(out_path, 'tp_core'), os.path.join(out_path, 'tp_web')]
-        out_files.extend(os.path.join(out_path, 'libtpssh.so'))
+        out_files.append(os.path.join(out_path, 'libtpssh.so'))
         if with_rdp:
-            out_files.extend(os.path.join(out_path, 'libtprdp.so'))
+            out_files.append(os.path.join(out_path, 'libtprdp.so'))
         # out_files.extend(os.path.join(out_path, 'libtptelnet.so'))
 
         for f in out_files:
@@ -98,9 +97,9 @@ class BuilderMacOS(BuilderBase):
 
         out_path = os.path.join(env.root_path, 'out', 'server', ctx.bits_path, 'bin')
         out_files = [os.path.join(out_path, 'tp_core'), os.path.join(out_path, 'tp_web')]
-        out_files.extend(os.path.join(out_path, 'libtpssh.so'))
+        out_files.append(os.path.join(out_path, 'libtpssh.so'))
         if with_rdp:
-            out_files.extend(os.path.join(out_path, 'libtprdp.so'))
+            out_files.append(os.path.join(out_path, 'libtprdp.so'))
         # out_files.extend(os.path.join(out_path, 'libtptelnet.so'))
 
         for f in out_files:
@@ -155,15 +154,6 @@ def main():
     if 'server' in argv:
         builder.build_server()
 
-        # if 'app' in argv:
-        #     builder.build_app()
-
-        # if 'installer' in argv:
-        #     builder.build_installer()
-
-        # if 'runtime' in argv:
-        #     builder.build_runtime()
-
 
 if __name__ == '__main__':
     try:
diff --git a/build/builder/core/makepyo.py b/build/builder/core/makepyo.py
index 30900ca..fffbcdf 100644
--- a/build/builder/core/makepyo.py
+++ b/build/builder/core/makepyo.py
@@ -9,6 +9,7 @@ import time
 import platform
 
 from . import colorconsole as cc
+from . import utils
 
 rm_file_every_level = ['.pyc', '.pyo']
 
@@ -47,7 +48,8 @@ def remove_cache(path):
         for d in dir_list:
             d = d.lower()
             if d == '__pycache__':
-                shutil.rmtree(os.path.join(parent, d))
+                # shutil.rmtree(os.path.join(parent, d))
+                utils.remove(os.path.join(parent, d))
                 continue
             remove_cache(os.path.join(parent, d))
 
diff --git a/build/builder/core/utils.py b/build/builder/core/utils.py
index 3131b41..5ddd8e6 100644
--- a/build/builder/core/utils.py
+++ b/build/builder/core/utils.py
@@ -107,7 +107,7 @@ def extension_suffixes():
 
 
 def remove(*args):
-    path = os.path.join(*args)
+    path = os.path.abspath(os.path.join(*args))
 
     cc.v('remove [%s] ...' % path, end='')
     if not os.path.exists(path):
@@ -118,6 +118,8 @@ def remove(*args):
         cc.v('.', end='')
         try:
             if os.path.isdir(path):
+                if path == '/':
+                    raise RuntimeError('### What are you doing?!! ###')
                 shutil.rmtree(path, ignore_errors=True)
                 time.sleep(0.5)
             else: