my $dir = dirname ($lexer_make) ;
chdir $dir ;
#system ("cd '$dir' && perl '$lexer_make'") and
my $rc ;
if (!($rc = system ('perl', $lexer_make)))
    {
    print "Install Compiler::Lexer\n\n" ;
    $rc = system ($lexer_inst, 'install') ;
    }
if ($rc) 
    {    
    warn "Cannot run perl Build.PL for Compiler::Lexer. You need to install Compiler::Lexer from Github (do not use version 0.22)" ;    
    }
chdir $mydir ;
}