dont install plugins if plugins exist as gems
dont install plugins if plugins exist as gems

ericboehs/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,jonasoberschweiber/heroku-buildpack-ruby,CPPWind/ruby-buildpack,moneyadviceservice/heroku-buildpack-ruby-bowndler,space150/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk-new,takii/db2rubybuildpack,Genius/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,zoomer/heroku-buildpack-ruby-bower,trumaker/heroku-buildpack-turbo-sprockets,tomwolfe/heroku-buildpack-gsl-ruby,jayshreeanand/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,dlorson/gentle-buildpack,hellojustin/heroku-buildpack-custom-ruby,takii/heroku-buildpack-ruby,Altoros/ruby-buildpack,sky-uk/ruby-buildpack,guidance-guarantee-programme/heroku-buildpack-princexml-old,mrhenry/heroku-buildpack-ruby,CPPWind/ruby-buildpack,brightbytes/heroku-buildpack-ruby-without-assets-precompile,sky-uk/help-heroku-buildpack,ericroberts/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,sky-uk/ruby-buildpack,swipesense/heroku-buildpack-ruby,fcruxen/ruby-buildpack,pietrop/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,Jonty/ruby-buildpack,shuber/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,michaelphines/alexa-nest,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,Micka33/heroku-buildpack-ruby-liblua,phusion/heroku-buildpack-ruby,daltonrenaldo/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,redhotvengeance/heroku-buildpack-deep-thought,stefansundin/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,Jonty/ruby-buildpack,bellycard/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,dtao/deft-buildpack-ruby,ablease/custom-buildpack,0x00evil/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,cmaggard/heroku-buildpack-turbo-sprockets,CPPWind/ruby-buildpack,hpcloud/ruby-buildpack,sstelfox/buildpack-ruby,icelab/heroku-buildpack-ruby,Scalingo/ruby-buildpack,teodor-pripoae/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,bskyb-commerce/ruby-buildpack,Micka33/heroku-buildpack-ruby-liblua,0x00evil/heroku-buildpack-ruby,guidance-guarantee-programme/heroku-buildpack-princexml-old,bskyb-commerce/ruby-buildpack,tenjikinc/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,bskyb-commerce/help-heroku-buildpack,sky-uk/ruby-buildpack,zoomer/heroku-buildpack-ruby-bower,diasks2/heroku-buildpack-mecab,shuber/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,hpcloud/ruby-buildpack,heroku/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,bskyb-commerce/ruby-buildpack,cloudn/buildpack-ruby,tdenovan/heroku-buildpack-ruby,fcruxen/ruby-buildpack,DouglasAllen/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,erintherad/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,hpcloud/ruby-buildpack,ndbroadbent/heroku-buildpack-turbo-sprockets,Jonty/ruby-buildpack,bskyb-commerce/help-heroku-buildpack,Genius/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,rhomobile/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,orlando/heroku-buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,Altoros/ruby-buildpack,jumptvs/BP_Ruby,jayshreeanand/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,ericroberts/heroku-buildpack-ruby,scottatron/moc-buildpack,mintybit/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,Git-Host/prelang-buildpack,KoanHealth/heroku-buildpack-marvin-setup,pkgr/heroku-buildpack-ruby,fcruxen/ruby-buildpack,cloudn/buildpack-ruby,sky-uk/ruby-buildpack,iamjarvo/ruby-buildpack,cordata/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,ilpoldo/heroku-buildpack-ruby,zidekmat/buildpack-ruby,mintybit/heroku-buildpack-ruby,jumptvs/BP_Ruby,fgbreel/heroku-buildpack-ruby,schu/buildpack-testing,ChefSteps/heroku-buildpack-ruby,vhx/heroku-buildpack,leonardykris/mos-ruby-buildpack,qnyp/heroku-buildpack-ruby-bower,ablease/custom-buildpack,teodor-pripoae/heroku-buildpack-ruby,Git-Host/prelang-buildpack,jeremyvdw/heroku-buildpack-ruby-jekyll,redhotvengeance/heroku-buildpack-deep-thought,tomwolfe/heroku-buildpack-gsl-ruby,pkgr/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,dtao/teeny-buildpack,jgable/buildpack-ruby-rack-setup-tasks,jeremyvdw/heroku-buildpack-ruby-jekyll,andycroll/heroku-buildpack-jekyll,electricobjects/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,qstream/heroku-buildpack-ruby,fcruxen/ruby-buildpack,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,heroku/heroku-buildpack-ruby,dieze/heroku-buildpack-ruby-hooks,CPPWind/ruby-buildpack,ascot21/heroku-buildpack-turbo-sprockets,amaltson/heroku-buildpack-ruby,hixi/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,cordata/heroku-buildpack-ruby,awebneck/heroku-buildpack-canvas,d-reinhold/cf-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk-new,dleavitt/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,schu/buildpack-testing,gbenedict/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,samfrench/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,swipesense/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,dlorson/gentle-buildpack,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,mperejda/heroku-buildpack-ruby,erintherad/heroku-buildpack-ruby,cloudControl/buildpack-ruby,ibmdb/db2rubybuildpack,hellojustin/heroku-buildpack-custom-ruby,bwaite-jaroop/heroku-buildpack-ruby,gbenedict/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,cloudfoundry/ruby-buildpack,awebneck/heroku-buildpack-canvas,bellycard/heroku-buildpack-ruby,barakav/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,jonasoberschweiber/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,scottatron/moc-buildpack,ekaranto/rails4-bluemix-buildpack,ablease/custom-buildpack,zunda/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,dleavitt/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,hatofmonkeys/ruby-testing-buildpack,dtao/deft-buildpack-ruby,rhomobile/heroku-buildpack-ruby,schu/heroku-buildpack-ruby,fgbreel/heroku-buildpack-ruby,hpcloud/ruby-buildpack,codykrieger/heroku-buildpack-jekyll,hatofmonkeys/ruby-testing-buildpack,andycroll/heroku-buildpack-jekyll,codykrieger/heroku-buildpack-jekyll,icelab/heroku-buildpack-ruby,reesio/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,space150/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,blueapron/heroku-buildpack-ruby,jumptvs/BP_Ruby,jumptvs/BP_Ruby,simonnordberg/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,cloudControl/buildpack-ruby,zunda/heroku-buildpack-ruby,Altoros/ruby-buildpack,mperejda/heroku-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,gls1/heroku-buildpack-ruby-pdftk,ablease/custom-buildpack,d-reinhold/cf-buildpack-ruby,mattwalters/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,beydogan/ruby-buildpack,instacart/heroku-buildpack-ruby,takii/db2rubybuildpack,brightbytes/heroku-buildpack-ruby-without-assets-precompile,aarongray/heroku-buildpack-ruby,Scalingo/ruby-buildpack,diasks2/heroku-buildpack-mecab,blueapron/heroku-buildpack-ruby,vhx/heroku-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,Jonty/ruby-buildpack,iamjarvo/ruby-buildpack,recursecenter/heroku-buildpack-ruby,beydogan/ruby-buildpack,DouglasAllen/heroku-buildpack-ruby,cloudn/buildpack-ruby,zidekmat/buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,cloudn/buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,dieze/heroku-buildpack-ruby-hooks,crdschurch/heroku-buildpack-ruby,orlando/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,trumaker/heroku-buildpack-turbo-sprockets,wakermahmud/heroku-buildpack-jekyll,wakermahmud/heroku-buildpack-jekyll,phusion/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,michaelphines/alexa-nest,stolt45/heroku-buildpack-ruby-with-sqlite3,ibmdb/db2rubybuildpack,stolt45/heroku-buildpack-ruby-with-sqlite3,simonnordberg/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,bskyb-commerce/ruby-buildpack,ndbroadbent/heroku-buildpack-turbo-sprockets,qstream/heroku-buildpack-ruby,takii/db2rubybuildpack,hixi/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,sstelfox/buildpack-ruby,mattwalters/heroku-buildpack-ruby,sky-uk/help-heroku-buildpack,crdschurch/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,stefansundin/heroku-buildpack-ruby,takii/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,mrhenry/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,schu/heroku-buildpack-ruby,leonardykris/mos-ruby-buildpack,ruby/heroku-buildpack-www-ruby-lang,allomov/fat-free-heroku-buildpack-ruby,phusion/heroku-buildpack-ruby,samfrench/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,barakav/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,dtao/teeny-buildpack,cmaggard/heroku-buildpack-turbo-sprockets,mattmanning/heroku-buildpack-ruby-jekyll,daltonrenaldo/heroku-buildpack-ruby,takii/db2rubybuildpack,jonseaberg/heroku-buildpack-turbo-sprockets,Altoros/ruby-buildpack,hatofmonkeys/ruby-testing-buildpack,rowanoulton/heroku-buildpack-ruby,reesio/heroku-buildpack-ruby