using BUNDLE_WITHOUT env var isn't a good idea
using BUNDLE_WITHOUT env var isn't a good idea

bskyb-commerce/ruby-buildpack,firmhouse/heroku-buildpack-ruby-freetds,nthj/heroku-buildpack-mirror,fgbreel/heroku-buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,musicglue/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,mrhenry/heroku-buildpack-ruby,millie/heroku-buildpack-ruby-with-pdftk,ekaranto/rails4-bluemix-buildpack,qstream/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,AJamesPhillips/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,pkgr/buildpack-ruby-precise-old,thirdprestige/heroku-buildpack-ruby,millie/heroku-buildpack-ruby-with-pdftk,DouglasAllen/heroku-buildpack-ruby,zoomer/heroku-buildpack-ruby-bower,CPPWind/ruby-buildpack,dtao/deft-buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,ericboehs/heroku-buildpack-ruby,atmos/heroku-buildpack-ruby,dleavitt/heroku-buildpack-ruby,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,dieze/heroku-buildpack-ruby-hooks,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,tpope/heroku-buildpack-ruby-tpope,codykrieger/heroku-buildpack-jekyll,daltonrenaldo/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,awebneck/heroku-buildpack-canvas,ascot21/heroku-buildpack-turbo-sprockets,gbenedict/heroku-buildpack-ruby,takii/db2rubybuildpack,crdschurch/heroku-buildpack-ruby,Altoros/ruby-buildpack,ablease/custom-buildpack,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,cmaggard/heroku-buildpack-turbo-sprockets,mattwalters/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,ibmdb/db2rubybuildpack,makifund/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,codykrieger/heroku-buildpack-jekyll,zidekmat/buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,scottatron/moc-buildpack,donnykurnia/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,ericroberts/heroku-buildpack-ruby,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,takii/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,guidance-guarantee-programme/heroku-buildpack-princexml-old,atmos/heroku-buildpack-ruby,WilliamDenniss/heroku-buildpack-ruby-imagemagick,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,sky-uk/ruby-buildpack,stefansundin/heroku-buildpack-ruby,schu/buildpack-testing,Genius/heroku-buildpack-ruby,ndbroadbent/heroku-buildpack-turbo-sprockets,cloudfoundry/ruby-buildpack,ejholmes/heroku-buildpack-middleman,joshco/heroku-buildpack-ruby,hpcloud/ruby-buildpack,sstelfox/buildpack-ruby,cloudControl/buildpack-ruby,meskyanichi/heroku-buildpack-middleman,musicglue/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,AJamesPhillips/heroku-buildpack-ruby,cloudn/buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,simonnordberg/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,sanemat/heroku-buildpack-ruby-tachikoma,progrium/heroku-buildpack-ruby,sky-uk/ruby-buildpack,recursecenter/heroku-buildpack-ruby,michaelphines/alexa-nest,travis-ci/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,takii/db2rubybuildpack,ablease/custom-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,bwaite-jaroop/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,pcincalifornia/wdc-heroku-buildpack-middleman,cloudfoundry/ruby-buildpack,thirdprestige/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,DigitalInnovation/heroku-buildpack-mslabs,DouglasAllen/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,bellycard/heroku-buildpack-ruby,mattwalters/heroku-buildpack-ruby,atmos/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,anay/buildpack-ruby-with-oracle-jdk,simonnordberg/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,hpcloud/ruby-buildpack,bellycard/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,ejholmes/heroku-buildpack-middleman,jonseaberg/heroku-buildpack-turbo-sprockets,sky-uk/ruby-buildpack,derrek/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,trumaker/heroku-buildpack-turbo-sprockets,swipesense/heroku-buildpack-ruby,hpcloud/ruby-buildpack,vhx/heroku-buildpack,hpcloud/heroku-buildpack-ruby,Altoros/ruby-buildpack,bskyb-commerce/ruby-buildpack,redhotvengeance/heroku-buildpack-deep-thought,davidjrice/heroku-buildpack-couchbase-ruby,erintherad/heroku-buildpack-ruby,stolt45/heroku-buildpack-ruby-with-sqlite3,michaelphines/alexa-nest,heroku/heroku-buildpack-ruby,orlando/heroku-buildpack-ruby,hpcloud/ruby-buildpack,hixi/heroku-buildpack-ruby,leonardykris/mos-ruby-buildpack,d-reinhold/cf-buildpack-ruby,pkgr/buildpack-ruby-precise-old,tdenovan/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,diasks2/heroku-buildpack-mecab,sgnpa/heroku-buildpack-cas,hausdorff/heroku-buildpack-ruby-jekyll,pkgr/heroku-buildpack-ruby,Numerico/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,wycats/heroku-buildpack-middleman,KoanHealth/heroku-buildpack-marvin-setup,teodor-pripoae/heroku-buildpack-ruby,travis-ci/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,jcamenisch/heroku-buildpack-rgeo,sanemat/heroku-buildpack-ruby-tachikoma,meskyanichi/heroku-buildpack-middleman,jgarber/heroku-buildpack-ruby-octopress,pkgr/buildpack-ruby-precise-old,pcincalifornia/wdc-heroku-buildpack-middleman,takii/db2rubybuildpack,ascot21/heroku-buildpack-turbo-sprockets,jcamenisch/heroku-buildpack-rgeo,cloudn/buildpack-ruby,phusion/heroku-buildpack-ruby,rstacruz/heroku-buildpack-middleman,amaltson/heroku-buildpack-ruby,12spokes/heroku-buildpack-ruby-imagemagick,vhx/heroku-buildpack,hausdorff/heroku-buildpack-ruby-jekyll,orenyk/heroku-buildpack-ruby,schu/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,sgnpa/heroku-buildpack-cas,sky-uk/ruby-buildpack,zidekmat/buildpack-ruby,awebneck/heroku-buildpack-canvas,jumptvs/BP_Ruby,mperejda/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,jeremyvdw/heroku-buildpack-ruby-jekyll,schu/heroku-buildpack-ruby,beydogan/ruby-buildpack,nthj/heroku-buildpack-mirror,mperejda/heroku-buildpack-ruby,sgnpa/heroku-buildpack-cas,DigitalInnovation/heroku-buildpack-mslabs,hatofmonkeys/ruby-testing-buildpack,gls1/heroku-buildpack-ruby-pdftk,jumptvs/BP_Ruby,Git-Host/prelang-buildpack,leonardykris/mos-ruby-buildpack,righi/instacart-heroku-buildpack,rhomobile/heroku-buildpack-ruby,sky-uk/help-heroku-buildpack,mrhenry/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,CPPWind/ruby-buildpack,jasonlevens/heroku-buildpack-ruby,hpcloud/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,Micka33/heroku-buildpack-ruby-liblua,ndbroadbent/heroku-buildpack-turbo-sprockets,progrium/heroku-buildpack-ruby,fcruxen/ruby-buildpack,WilliamDenniss/heroku-buildpack-ruby-imagemagick,dtao/teeny-buildpack,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,dieze/heroku-buildpack-ruby-hooks,ibmdb/db2rubybuildpack,iamjarvo/ruby-buildpack,ericroberts/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,ltrademark/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,wycats/heroku-buildpack-middleman,wolfoo2931/heroku-buildpack-ruby-2a352ae,jumptvs/BP_Ruby,instacart/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,jgable/buildpack-ruby-rack-setup-tasks,Altoros/ruby-buildpack,wakermahmud/heroku-buildpack-jekyll,Jonty/ruby-buildpack,hone/heroku-buildpack-ruby,AdStage/heroku-buildpack-ruby,ActiveState/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,WilliamDenniss/heroku-buildpack-ruby-imagemagick,jglascoe/heroku-buildpack-ruby-jekyll,Scalingo/ruby-buildpack,dlorson/gentle-buildpack,Jonty/ruby-buildpack,swipesense/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,diasks2/heroku-buildpack-mecab,ilpoldo/heroku-buildpack-ruby,Git-Host/prelang-buildpack,engineyard/heroku-buildpack-ruby,hellojustin/heroku-buildpack-custom-ruby,shuber/heroku-buildpack-ruby,jgarber/heroku-buildpack-ruby-octopress,darron/heroku-buildpack-ruby-jekyll,phusion/heroku-buildpack-ruby,ablease/custom-buildpack,gls1/heroku-buildpack-ruby-pdftk,Genius/heroku-buildpack-ruby,cloudn/buildpack-ruby,space150/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,cloudfoundry/ruby-buildpack,zunda/heroku-buildpack-ruby,Jonty/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,iamjarvo/ruby-buildpack,lyoshenka/heroku-buildpack-ruby-jekyll,orenyk/heroku-buildpack-ruby,scottatron/moc-buildpack,0x00evil/heroku-buildpack-ruby,takii/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,Numerico/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,reesio/heroku-buildpack-ruby,shuber/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,CPPWind/ruby-buildpack,takii/db2rubybuildpack,firmhouse/heroku-buildpack-ruby-freetds,cmaggard/heroku-buildpack-turbo-sprockets,aarongray/heroku-buildpack-ruby,wolfoo2931/heroku-buildpack-ruby-2a352ae,tomwolfe/heroku-buildpack-gsl-ruby,hone/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,jayshreeanand/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,cloudn/buildpack-ruby,12spokes/heroku-buildpack-ruby-imagemagick,AdStage/heroku-buildpack-ruby,phusion/heroku-buildpack-ruby,joshco/heroku-buildpack-ruby,nicholasmott/heroku-buildpack-octopress,travis-ci/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,thirdprestige/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,dlorson/gentle-buildpack,bskyb-commerce/ruby-buildpack,Scalingo/ruby-buildpack,erintherad/heroku-buildpack-ruby,redhotvengeance/heroku-buildpack-deep-thought,cordata/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,hellojustin/heroku-buildpack-custom-ruby,jasonlevens/heroku-buildpack-ruby,sky-uk/help-heroku-buildpack,d-reinhold/cf-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,jayshreeanand/heroku-buildpack-ruby,nicholasmott/heroku-buildpack-octopress,ActiveState/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,jgarber/heroku-buildpack-ruby-octopress,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,orlando/heroku-buildpack-ruby,stolt45/heroku-buildpack-ruby-with-sqlite3,gls1/heroku-buildpack-ruby-pdftk-new,d-reinhold/cf-buildpack-ruby,reesio/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,stefansundin/heroku-buildpack-ruby,zoomer/heroku-buildpack-ruby-bower,hatofmonkeys/ruby-testing-buildpack,rhomobile/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,bskyb-commerce/help-heroku-buildpack,jonasoberschweiber/heroku-buildpack-ruby,tomwolfe/heroku-buildpack-gsl-ruby,0x00evil/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,pavgup/heroku-buildpack-ruby-lateslugignore,rowanoulton/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,space150/heroku-buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,ablease/custom-buildpack,guidance-guarantee-programme/heroku-buildpack-princexml-old,brightbytes/heroku-buildpack-ruby-without-assets-precompile,daltonrenaldo/heroku-buildpack-ruby,cloudControl/buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,dtao/teeny-buildpack,wakermahmud/heroku-buildpack-jekyll,CPPWind/ruby-buildpack,makifund/heroku-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,rstacruz/heroku-buildpack-middleman,pavgup/heroku-buildpack-ruby-lateslugignore,tpope/heroku-buildpack-ruby-tpope,Jonty/ruby-buildpack,barakav/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,hatofmonkeys/ruby-testing-buildpack,mintybit/heroku-buildpack-ruby,fcruxen/ruby-buildpack,samfrench/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,Altoros/ruby-buildpack,andycroll/heroku-buildpack-jekyll,bskyb-commerce/help-heroku-buildpack,Numerico/heroku-buildpack-ruby,pavgup/heroku-buildpack-ruby-lateslugignore,gbenedict/heroku-buildpack-ruby,jglascoe/heroku-buildpack-ruby-jekyll,barakav/heroku-buildpack-ruby,hixi/heroku-buildpack-ruby,crdschurch/heroku-buildpack-ruby,nicholasmott/heroku-buildpack-octopress,dleavitt/heroku-buildpack-ruby,AdStage/heroku-buildpack-ruby,firmhouse/heroku-buildpack-ruby-freetds,schu/buildpack-testing,jeremyvdw/heroku-buildpack-ruby-jekyll,gls1/heroku-buildpack-ruby-pdftk-new,teodor-pripoae/heroku-buildpack-ruby,sanemat/heroku-buildpack-ruby-tachikoma,iamjarvo/ruby-buildpack,cordata/heroku-buildpack-ruby,ruby/heroku-buildpack-www-ruby-lang,fgbreel/heroku-buildpack-ruby,darron/heroku-buildpack-ruby-jekyll,fcruxen/ruby-buildpack,davidjrice/heroku-buildpack-couchbase-ruby,dtao/deft-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,sstelfox/buildpack-ruby,AJamesPhillips/heroku-buildpack-ruby,adaptivelab/heroku-buildpack-adaptivelab-website-2,samfrench/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,adaptivelab/heroku-buildpack-adaptivelab-website-2,qnyp/heroku-buildpack-ruby-bower,fcruxen/ruby-buildpack,jumptvs/BP_Ruby,beydogan/ruby-buildpack