diff --git a/arguments.py b/arguments.py
index fe93f23..527c6f7 100644
--- a/arguments.py
+++ b/arguments.py
@@ -2,6 +2,7 @@ import argparse
 import os
 
 import msys
+import subsystem
 
 ACTION = 'action'
 ARCHITECTURES = 'architectures'
@@ -51,7 +52,7 @@ msys remote repository's location
 list of architectures to sync
 ''')
     sync.add_argument(f'-{SUBSYSTEMS[0]}', f'--{SUBSYSTEMS}', type=str,
-                      nargs='+', choices=msys.SUBSYSTEMS, help='''\
+                      nargs='+', choices=subsystem.FAMILIES, help='''\
 list of subsystems to sync
 ''')
 
diff --git a/msys.py b/msys.py
index 2dd581e..6c2d1a1 100644
--- a/msys.py
+++ b/msys.py
@@ -7,4 +7,3 @@ SIGNATURE = '.sig'
 SUBSYSTEM = 'msys'
 
 ARCHITECTURES = [ARCHITECTURE, 'i686']
-SUBSYSTEMS = [SUBSYSTEM, 'clang', 'mingw', 'ucrt']