fix root metapackage not getting created under some circumstances
fix root metapackage not getting created under some circumstances

a2service/heroku-buildpack-php,puteulanus/heroku-buildpack-php,0ppy/sample-buildpack,thecsea/heroku-buildpack-php-with-ioncube,rikur/heroku-buildpack-php,emeth-/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,dzuelke/heroku-buildpack-php,alzheic/heroku-buildpack-aop,heroku/heroku-buildpack-php,dzuelke/heroku-buildpack-php,flant/heroku-buildpack-php,rikur/heroku-buildpack-php,rs-makino/buildpack-test,thecsea/heroku-buildpack-php-with-ioncube,rs-makino/buildpack-test,dzuelke/heroku-buildpack-php,puteulanus/heroku-buildpack-php,a2service/heroku-buildpack-php,martijngastkemper/heroku-buildpack-php,rs-makino/buildpack-test,thecsea/heroku-buildpack-php-with-ioncube,emeth-/heroku-buildpack-php,emeth-/heroku-buildpack-php,martijngastkemper/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,rs-makino/buildpack-test,heroku/heroku-buildpack-php,rikur/heroku-buildpack-php,0ppy/sample-buildpack,flant/heroku-buildpack-php,a2service/heroku-buildpack-php,flant/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,jayelkaake/heroku-buildpack-magento,createmultimedia/heroku-buildpack-php,heroku/heroku-buildpack-php,alzheic/heroku-buildpack-aop,rs-makino/buildpack-test,rikur/heroku-buildpack-php,alzheic/heroku-buildpack-aop,puteulanus/heroku-buildpack-php,rs-makino/buildpack-test,0ppy/sample-buildpack,heroku/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,emeth-/heroku-buildpack-php