use a generic jruby folder for JRUBY_HOME
use a generic jruby folder for JRUBY_HOME

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