use env shell program for env vars
use env shell program for env vars

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