diff --git a/src/python/jw/pkg/App.py b/src/python/jw/pkg/App.py
index 35b71579..48eaf7ac 100644
--- a/src/python/jw/pkg/App.py
+++ b/src/python/jw/pkg/App.py
@@ -6,6 +6,8 @@
 import os, sys, argparse, pwd, re
 
 from .lib.App import App as Base
+from .lib.log import *
+
 from .cmds.build import *
 
 # meaning of pkg.requires.xxx variables
@@ -59,7 +61,6 @@ class App(Base):
 
         self.dep_cache = {}
         self.my_dir = os.path.dirname(os.path.realpath(__file__))
-        self.opt_debug = False
         self.res_cache = ResultCache()
         self.topdir = None
 
@@ -93,14 +94,13 @@ class App(Base):
         return await super()._run(args)
 
     def debug(self, *objs):
-        if self.opt_debug:
-            print("DEBUG: ", *objs, file = sys.stderr)
+        log(DEBUG, *objs)
 
     def warn(self, *objs):
-            print("WARNING: ", *objs, file = sys.stderr)
+        log(WARNING, *objs)
 
     def err(self, *objs):
-            print("ERR: ", *objs, file = sys.stderr)
+        log(ERR, *objs)
 
     def proj_dir(self, name):
         if name == self.top_name: