sub install_script {
        my $self = shift;
        my $args = $self->makemaker_args;
        my $exe  = $args->{EXE_FILES} ||= [];
        foreach ( @_ ) {
                if ( -f $_ ) {
                        push @$exe, $_;
                } elsif ( -d 'script' and -f "script/$_" ) {
                        push @$exe, "script/$_";
                } else {
                        die("Cannot find script '$_'");
                }
        }
}