--- local/fixproc
+++ local/fixproc
@@ -231,7 +231,7 @@
     {
       # it must be "shell", so execute the shell script defined in database
 
-      local ($tmpfile) = "/tmp/fix_$$";
+      local ($tmpfile) = `mktemp /tmp/fix.XXXXXXXX`;
 
       &create_sh_script ($fix{$proc}, $tmpfile);
 
@@ -262,7 +262,7 @@
       # if not "exist", then it must be "shell", so execute the shell script
       # defined in database
 
-      local ($tmpfile) = "/tmp/check_$$";
+      local ($tmpfile) = `mktemp /tmp/check.XXXXXXXX`;
 
       &create_sh_script ($check{$proc}, $tmpfile);