don't print that the stack changed.
don't print that the stack changed.

swils/heroku-buildpack-python,doda/heroku-buildpack-python,HanSooloo/heroku-buildpack-python,Apogaea/heroku-buildpack-python,marcospy/heroku-buildpack-scipy,gitricko/apt-python-buildpack,benjaminfox/heroku-buildpack-python-geoip,andrespires/python-buildpack,edmorley/heroku-buildpack-python,18F/python-buildpack,samuelhavron/heroku-buildpack-python,joshisa/python-buildpack,icoxfog417/heroku-buildpack-python,maciejgryka/heroku-buildpack-spcedge,samuelhavron/heroku-buildpack-python,brightforme/heroku-buildpack-python,18F/python-buildpack,martingascon/heroku-buildpack-python,Mause/heroku-buildpack-python,slorg1/heroku-buildpack-python,thenovices/heroku-buildpack-scipy,loanzen/heroku-buildpack-python,liyanchang/cloudfoundary-buildbot-buildpack,samuelhavron/heroku-buildpack-python,alexflanagan/operand-buildpack-python,agriffis/heroku-buildpack-python,bobsilverberg/heroku-buildpack-python-peep,HousekeepLtd/heroku-buildpack-python,stalnacke/heroku-buildpack-python,kvarga/heroku-buildpack-python,alexflanagan/operand-buildpack-python,heroku/heroku-buildpack-python,predata/heroku-buildpack-scipy,swanson/heroku-buildpack-python-ortools,TipWander/heroku-buildpack-geodjango,wbrefvem/heroku-buildpack-python,Tiger66639/buildbot-master-buildpack,rbtying/heroku-buildpack-python,maxcountryman/heroku-buildpack-python,ad-m/heroku-buildpack-python,AltSchool/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,ad-m/heroku-buildpack-python,andrespires/python-buildpack,kowito/python-buildpack,Stibbons/heroku-buildpack-python-installer,heroku/heroku-buildpack-python,ekkleesia2/heroku-buildpack-python,driftyco/heroku-buildpack-sphinx,PerceptumNL/heroku-buildpack-python,DylanLukes/heroku-buildpack-python,jimlindeman/python-buildpack-collectd,samuelhavron/heroku-buildpack-python,joshisa/python-buildpack,samuelhavron/heroku-buildpack-python,monological/heroku-buildpack-python-opencv,liyanchang/cloudfoundary-buildbot-buildpack,gaumire/heroku-buildpack-python,jimlindeman/python-buildpack-collectd,arnaudlimbourg/heroku-buildpack-python,zakdoek/heroku-buildpack-django,nwkotto/geodjango-buildpack-with-geos,dubsmash/heroku-buildpack-python,nemesiscodex/heroku-buildpack-python,lukaszkorecki/heroku-buildpack-python,doda/heroku-buildpack-python,nadirizr/heroku-buildpack-python-gulp,benmurden/heroku-buildpack-python-ember,miraculixx/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,jamarparris/heroku-buildpack-python-swig,pkumar-appd/python-buildpack,kowito/python-buildpack,joshisa/python-buildpack,vlidholt/heroku-buildpack-scipy,plangrid/heroku-buildpack-python,cloudfoundry/python-buildpack,Scalingo/python-buildpack,ywarezk/heroku-buildpack-geodjango,AltSchool/heroku-buildpack-python,zakdoek/heroku-buildpack-django,edenspiekermann-amsterdam/heroku-buildpack-python,integricho/heroku-buildpack-python-ffmpeg2.1-with-codecs,ojacobson/heroku-buildpack-python,blazekadam/open2,rapilabs/heroku-buildpack-python,pwdel1/heroku-buildpack-scipy,grivescorbett/heroku-buildpack-python,andrespires/python-buildpack,junyoed/heroku-buildpack-python,dulaccc/heroku-buildpack-geodjango,benmurden/heroku-buildpack-python-ember,buildbot/buildbot-master-buildpack,marcospy/hackathon-globo-app,jvenezia/heroku-buildpack-python,gitricko/apt-python-buildpack,pkumar-appd/python-buildpack,adamroth/heroku-buildpack-python-pdftk,WonderThink/heroku-buildpack-python-ffmpeg-geoip,joshfriend/heroku-buildpack-python,pkumar-appd/python-buildpack,manufacturedba/heroku-buildpack-python,pmclanahan/heroku-buildpack-python-peep,xica/heroku-buildpack-scipy,Nazanin84/python-buildpack,Nazanin84/python-buildpack,resmio/heroku-buildpack-geodjango,marcospy/hackathon-globo-app,river-jade/heroku-buildpack-scipy,pebble/cloudpebble-buildpack,wbrefvem/heroku-buildpack-python,Nazanin84/python-buildpack,liyanchang/cloudfoundary-buildbot-buildpack,beni55/heroku-buildpack-python,cclauss/heroku-buildpack-python,liyanchang/buildbot-master-buildpack,jimlindeman/python-buildpack-collectd,smalleats/heroku-buildpack-python,projetoeureka/heroku-buildpack-scipy,gitricko/apt-python-buildpack,marcospy/hackathon-globo-app,ruscoder/heroku-buildpack-python,soapril/heroku-buildpack-python,ephemerallabs/heroku-buildpack-python,mythmon/heroku-buildpack-python-nodejs,andela-brotich/wger-buildpack-python,nicktimko/heroku-buildpack-scipy,cortexintel/heroku-buildpack-scipy,tommyvn/heroku-buildpack-python,kowito/python-buildpack,cloudfoundry/python-buildpack,benjaminfox/heroku-buildpack-python-geoip,ryanhiebert/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,skilljar/heroku-buildpack-python,Brogency/heroku-buildpack-python-gulp,brianthomas/heroku-buildpack-textmining,Scalingo/python-buildpack,rollokb/heroku-buildpack-python,marianzange/heroku-buildpack-python,oberlin/heroku-buildpack-python,cloudfoundry/python-buildpack,18F/python-buildpack