diff --git a/builder.py b/builder.py
index 15ec1fa..c099484 100644
--- a/builder.py
+++ b/builder.py
@@ -116,7 +116,7 @@ def main(targets, buildfunc):
 
     def done(t, rv):
         if rv:
-            err('%s: exit code was %r\n' % (t, rv))
+            #err('%s: exit code was %r\n' % (t, rv))
             retcode[0] = 1
 
     for i in range(len(targets)):
@@ -127,6 +127,8 @@ def main(targets, buildfunc):
     
     for t in targets:
         jwack.get_token(t)
+        if retcode[0] and not vars.KEEP_GOING:
+            break
         lock = state.Lock(t)
         lock.trylock()
         if not lock.owned:
@@ -139,6 +141,8 @@ def main(targets, buildfunc):
     
     while locked or jwack.running():
         jwack.wait_all()
+        if retcode[0] and not vars.KEEP_GOING:
+            break
         if locked:
             t = locked.pop(0)
             lock = state.Lock(t)
diff --git a/redo.py b/redo.py
index b13df5a..4b359f8 100755
--- a/redo.py
+++ b/redo.py
@@ -9,6 +9,7 @@ j,jobs=    maximum number of jobs to build at once
 d,debug    print dependency checks as they happen
 v,verbose  print commands as they are read from .do files (variables intact)
 x,xtrace   print commands as they are executed (variables expanded)
+k,keep-going  keep going as long as possible even if some targets fail
 shuffle    randomize the build order to find dependency bugs
 debug-locks  print messages about file locking (useful for debugging)
 """
@@ -23,6 +24,8 @@ if opt.verbose:
     os.environ['REDO_VERBOSE'] = '1'
 if opt.xtrace:
     os.environ['REDO_XTRACE'] = '1'
+if opt.keep_going:
+    os.environ['REDO_KEEP_GOING'] = '1'
 if opt.shuffle:
     os.environ['REDO_SHUFFLE'] = '1'
 if opt.debug_locks:
@@ -67,8 +70,8 @@ try:
         retcode = builder.main(targets, builder.build)
     finally:
         jwack.force_return_tokens()
-    if retcode:
-        err('exiting: %d\n' % retcode)
+    #if retcode:
+    #    err('exiting: %d\n' % retcode)
     sys.exit(retcode)
 except KeyboardInterrupt:
     sys.exit(200)
diff --git a/vars.py b/vars.py
index 191a0da..9b04c31 100644
--- a/vars.py
+++ b/vars.py
@@ -8,6 +8,7 @@ DEBUG = atoi.atoi(os.environ.get('REDO_DEBUG', ''))
 DEBUG_LOCKS = os.environ.get('REDO_DEBUG_LOCKS', '') and 1 or 0
 VERBOSE = os.environ.get('REDO_VERBOSE', '') and 1 or 0
 XTRACE = os.environ.get('REDO_XTRACE', '') and 1 or 0
+KEEP_GOING = os.environ.get('REDO_KEEP_GOING', '') and 1 or 0
 SHUFFLE = os.environ.get('REDO_SHUFFLE', '') and 1 or 0
 STARTDIR = os.environ['REDO_STARTDIR']
 BASE = os.environ['REDO_BASE']