--- debderiver
+++ debderiver_patch3_2_2.py
@@ -477,12 +478,19 @@
 
 
 if __name__ == "__main__":
-    # Check for reprepro
-    if not os.path.exists('/usr/bin/reprepro'):
-        raise IOError, 'Missing dependency: install reprepro and try again.'
+    try:
+        open('/usr/bin/reprepro')
+    except IOError:
+        sys.stderr.write('Missing dependency: install reprepro and '
+                         'try again\n')
 
     CONF_DIR_PATH = '/etc/debderiver'
 
+    try:
+        open('%s/debderiver.yaml' % CONF_DIR_PATH)
+    except IOError:
+        sys.stderr.write('Copy "debderiver.yaml" to "%s" and edit it '
+                         'to suit your needs\n' % CONF_DIR_PATH)
     conf = parse(CONF_DIR_PATH)
     rr = Reprepro(conf)
     rr.configure()