run.go | 6 ++----

diff --git a/run.go b/run.go
index a2cad4f419817b6c3f427ef64fbb60fcf7428999e459334a4aa4562c7a942559..287e5cbf0939b2dca7fb77515c6fbd33d61b62283761a2e77f6e3f38886dfbe5 100644
--- a/run.go
+++ b/run.go
@@ -384,14 +384,13 @@ 	var fdStderr *os.File
 	if StderrKeep {
 		fdStderr, err = os.OpenFile(
 			path.Join(redoDir, tgt+LogSuffix),
-			os.O_WRONLY|os.O_CREATE,
+			os.O_WRONLY|os.O_CREATE|os.O_TRUNC,
 			os.FileMode(0666),
 		)
 		if err != nil {
 			cleanup()
 			return TgtErr{tgtOrig, err}
 		}
-		fdStderr.Truncate(0)
 	}
 	shCtx := fmt.Sprintf(
 		"sh: %s: %s %s cwd:%s dirprefix:%s",
@@ -451,10 +450,9 @@ 				fdStderr.Close()
 				logRecPath := path.Join(redoDir, tgt+LogSuffix+DepSuffix)
 				if fdStderr, err = os.OpenFile(
 					logRecPath,
-					os.O_WRONLY|os.O_CREATE,
+					os.O_WRONLY|os.O_CREATE|os.O_TRUNC,
 					os.FileMode(0666),
 				); err == nil {
-					fdStderr.Truncate(0)
 					fields := []recfile.Field{
 						{Name: "Build", Value: BuildUUID},
 						{Name: "PID", Value: strconv.Itoa(cmd.Process.Pid)},