diff --git a/webbuild/webbuild-sudo b/webbuild/webbuild-sudo
index 315fb0d..a296237 100755
--- a/webbuild/webbuild-sudo
+++ b/webbuild/webbuild-sudo
@@ -127,11 +127,15 @@ cmdtmpfile=`mktemp --tmpdir=$WEBBUILD_STATEDIR/tmp --suffix=.webbuildcmd`
 if [ "$MODE" = "background" ]; then
    if [ "$WORKINGHOME" ]; then
       [ "$DEBUG" ] && echo "=> . /etc/profile;cd $WORKINGHOME/RPM/SPECS;$SUCMDPREFIX \"$COMMAND\""
-      $SUCMDPREFIX ". /etc/profile;cd $WORKINGHOME/RPM/SPECS;$COMMAND;echo \"# WEBBUILD_EXITCODE=\$?\"" 2>&1 | tr -d '\f' > $cmdtmpfile &
+      # WARNING: don't add pipes after $COMMAND or command pid will be wrong
+      $SUCMDPREFIX ". /etc/profile;cd $WORKINGHOME/RPM/SPECS;stdbuf -o L $COMMAND;echo \"# WEBBUILD_EXITCODE=\$?\"" 2>&1 > $cmdtmpfile &
+      # | tr -d '\f'
       #sed "s|<|\&lt;|g" | 
    else
       [ "$DEBUG" ] && echo "=> $SUCMDPREFIX \"$COMMAND\""
-      $SUCMDPREFIX "$COMMAND;echo \"# WEBBUILD_EXITCODE=\$?\"" 2>&1 | sed "s|<|\&lt;|g" | tr -d '\f' > $cmdtmpfile &
+      # WARNING: don't add pipes after $COMMAND or command pid will be wrong
+      $SUCMDPREFIX "$COMMAND;echo \"# WEBBUILD_EXITCODE=\$?\"" 2>&1 > $cmdtmpfile &
+      # | sed "s|<|\&lt;|g" | tr -d '\f'
    fi
    echo "$! $USER $ENVIRONMENT $PACKAGE $cmdtmpfile 256 $COMMAND" >> $WEBBUILD_STATEDIR/processes
    echo "Started background command: $COMMAND"