diff --git a/build.py b/build.py
index 09a28516..7f7fd80d 100755
--- a/build.py
+++ b/build.py
@@ -606,6 +606,8 @@ def doxhtml(options, args):
 def etg(options, args):
     cmdTimer = CommandTimer('etg')
     cfg = Config()
+    assert os.path.exists(cfg.DOXY_XML_DIR), "Doxygen XML folder not found: " + cfg.DOXY_XML_DIR
+    
     pwd = pushDir(cfg.ROOT_DIR)
 
     # TODO: Better support for selecting etg cmd-line flags...
diff --git a/etgtools/__init__.py b/etgtools/__init__.py
index df901767..d03d5a05 100644
--- a/etgtools/__init__.py
+++ b/etgtools/__init__.py
@@ -26,7 +26,6 @@ cfg = Config(noWxConfig=True)
 
 phoenixRoot = cfg.ROOT_DIR
 XMLSRC = cfg.DOXY_XML_DIR
-assert os.path.exists(XMLSRC), "Unable to locate Doxygen XML files at " + XMLSRC
 
 
 #---------------------------------------------------------------------------