always install node.js for rails 3.1 :{
always install node.js for rails 3.1 :{

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