$methods{$_} = eval qq(
  package $caller;
  sub {
    my \$self = shift;
    #
    #print "installing $method_name() in $caller...\n";
    #
    # Without \$caller and eval, the following line causes this error:
    # 
    # Can't locate auto/CustomMethodMaker/SUPER/[METHOD].al in \@INC
    #
    my \@parent_slots;
    if ( \$self->can( SUPER::$method_name ) ) {
      \@parent_slots = \$self->SUPER::$method_name( \@_ );
    }
    return ( \@parent_slots, \@slots );
  }
);
die $@ if $@;