diff --git a/install.py b/install.py
index 352d86f..af3c0e2 100755
--- a/install.py
+++ b/install.py
@@ -46,6 +46,7 @@ if serial is None:
 
  
 TOOLS = BoxInfo.TOOLS
+BOX_TYPES = {'ionopi', 'ionopimax', 'controlbox', 'bare-apu', 'dual-eth-rpi'}
 
 more_info = False
 
@@ -158,7 +159,7 @@ box = BoxInfo()
 box.hostname_changed = False
 dhcp_server_cfg = []
 
-TO_SYSTEM = TOOLS / 'to_system', TOOLS / f'{box.typ}_system']
+TO_SYSTEM = TOOLS / 'to_system', TOOLS / f'{box.typ}_system'
 
 
 def do_cmd(*command):
@@ -464,15 +465,15 @@ class Show(Walker):
 
 class Do(Walker):
     def newer(self, files):
-        unix_cmd('cp', *(str(srcdir / f) for f in files), str(dstdir),
-                 sudo=not dstdir.is_relative_to('/home/l_samenv'))
+        unix_cmd('cp', *(str(self.dirpath / f) for f in files), str(self.syspath),
+                 sudo=not self.syspath.is_relative_to(Path.home()))
 
     older = newer
 
     missing = newer
 
     def delete(self, files):
-        unix_cmd('rm', '-f', *(str(srcdir / f) for f in files))
+        unix_cmd('rm', '-f', *(str(self.syspath / f) for f in files))
 
 
 def handle_config():
@@ -485,14 +486,12 @@ def handle_config():
     newhostname = box.hostname
     if cfgfile:
         if box.hwtype != 'apu':
-            try:
-                typ = config.get('BOX', {}).get('type')
-                if typ:
-                    box.typ = typ
-            except ValueError:
-                pass
-        else:
-            if box.typ == 'cm4':
+            typ = config.get('BOX', {}).get('type')
+            if typ:
+                if typ not in BOX_TYPES:
+                    raise ValueError(f'unknown type={typ} defined in BOX section')
+                box.typ = typ
+            elif box.typ == 'cm4':
                 print('WARNING: missing type in BOX section')
                 print('This is a cm4 so guess its a dual-eth-rpi')
                 box.typ = 'dual-eth-rpi'
@@ -500,8 +499,6 @@ def handle_config():
                 print('WARNING: missing type in BOX section')
                 print('This is a cm3 so guess its a ionopimax')
                 box.typ = 'ionopimax'
-            else:
-                raise ValueError(f'unknown type={typ} defined in BOX section')
     else:
         if box.typ == 'apu':
             # determine if display is present