run.go   | 8 +++++++-
 tmp.go   | 6 ------
 usage.go | 2 +-

diff --git a/run.go b/run.go
index 28cfeb6fe8a036df9f46da2ff551978bc2e416547af86bc193991245b8a4572b..4e54635ffa1e56228afa7075ab9dd2556938dc3d89d624e940152fcf2f109a19 100644
--- a/run.go
+++ b/run.go
@@ -21,6 +21,8 @@ package main
 
 import (
 	"bufio"
+	"crypto/rand"
+	"encoding/hex"
 	"errors"
 	"flag"
 	"fmt"
@@ -402,7 +404,11 @@ 	cmd.Env = append(os.Environ(), fmt.Sprintf("%s=%d", EnvLevel, Level+1))
 	cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", EnvDirPrefix, dirPrefix))
 	cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", EnvBuildUUID, BuildUUID))
 
-	childStderrPrefix := tempsuffix()
+	childStderrPrefixRaw := make([]byte, 8)
+	if _, err = io.ReadFull(rand.Reader, childStderrPrefixRaw); err != nil {
+		panic(err)
+	}
+	childStderrPrefix := hex.EncodeToString(childStderrPrefixRaw)
 	cmd.Env = append(cmd.Env, fmt.Sprintf(
 		"%s=%s", EnvStderrPrefix, childStderrPrefix,
 	))
diff --git a/tmp.go b/tmp.go
index 13ec38ed6e8f228626d208344d7a60e9892bcf06d4917bce4867f3d9a02b9ddf..1107023bf5d41f3775e9aa869e032d1546c738a4625c3b72daf968615c1fe1ae 100644
--- a/tmp.go
+++ b/tmp.go
@@ -21,13 +21,7 @@ package main
 
 import (
 	"os"
-	"strconv"
-	"time"
 )
-
-func tempsuffix() string {
-	return strconv.FormatInt((time.Now().UnixNano()+int64(os.Getpid()))&0xFFFFFFFF, 16)
-}
 
 func tempfile(dir, prefix string) (*os.File, error) {
 	tmp, err := os.CreateTemp(dir, prefix)
diff --git a/usage.go b/usage.go
index 6b5089568d9bf5b28039459b22e79929e752d0dc44abbd15b54a131169da7b82..7ba89b46961f16087914c9875cf530a07b629ac4aa8eebe25025d4050e54c9b5 100644
--- a/usage.go
+++ b/usage.go
@@ -24,7 +24,7 @@ 	"os"
 )
 
 const (
-	Version  = "1.25.0"
+	Version  = "1.26.0"
 	Warranty = `Copyright (C) 2020-2022 Sergey Matveev
 
 This program is free software: you can redistribute it and/or modify