sub MY::postamble {
  return '' if !-e '.git';
  my $container = 'graphqlperl/graphql';
  my $prereq = "${container}-prereq";
  <<EOF;
\$(VERSION_FROM) : graphql.pgx
\t\$(PERL) -Ilib -MGraphQL::Language::Grammar=compile

pure_all :: README.md

README.md : \$(VERSION_FROM)
\tpod2markdown \$< >\$\@
# then some Docker stuff