diff --git a/call_task.sh b/call_task.sh
index 330ae0a..0ddba5d 100755
--- a/call_task.sh
+++ b/call_task.sh
@@ -5,6 +5,7 @@ TASK=$1
 printf "${CYAN}===========[$TASK]===========\n"
 source cbuild/init.sh
 
+clear_dir $OBJDIR
 
 if [ -f "$PRE_TASK_SCRIPT" ]; then
     printf "${BLUE}executing $PRE_TASK_SCRIPT\n"
diff --git a/functions.sh b/functions.sh
index 0caf552..f9f89fd 100755
--- a/functions.sh
+++ b/functions.sh
@@ -62,7 +62,6 @@ $(find $OBJDIR -name '*.a')"
     if $CMP_CPP $args -o $outfile $(echo $objects | tr '\n' ' ')
     then 
         printf "${GREEN}file $CYAN$outfile ${GREEN}created\n${GRAY}"
-        clear_dir $OBJDIR
     else
         printf "${RED}some error happened\n${GRAY}"
         exit 1
@@ -79,7 +78,6 @@ function pack_static_lib {
     if ar rcs $outfile $(echo $objects | tr '\n' ' ')
     then 
         printf "${GREEN}file $CYAN$outfile ${GREEN}created\n${GRAY}"
-        clear_dir $OBJDIR
     else
         printf "${RED}some error happened\n${GRAY}"
         exit 1