set db engine explicitly on url scheme
set db engine explicitly on url scheme

smalleats/heroku-buildpack-python,mtigas/heroku-buildpack-pypy,evnpr/herokupython,kikin81/heroku-buildpack,aldryn/heroku-buildpack-python,SciDevs/heroku-buildpack-python-scikit-learn-git,integricho/heroku-buildpack-python-ffmpeg-lame,marcospy/hackathon-globo-app,econchick/heroku-buildpack-python,Nazanin84/python-buildpack,nemesiscodex/heroku-buildpack-python,Scalingo/python-buildpack,drinks/heroku-buildpack-python-scipy,benjaminfox/heroku-buildpack-python-geoip,Mause/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,snapist/heroku-buildpack-python-opencv,incuna/heroku-buildpack-python-test,dbrgn/heroku-npscipy,wyn/heroku-buildpack-python,lucasvo/heroku-buildpack-python-with-node,sookasa/heroku-buildpack-python-pipeline,legnaleurc/heroku-buildpack-python,nadirizr/heroku-buildpack-python-gulp,jbenet/heroku-buildpack-python,andrespires/python-buildpack,benmurden/heroku-buildpack-python-ember,Gliimpse/heroku-buildpack-SWIG-python,tommyvn/heroku-buildpack-python,dbrgn/heroku-buildpack-python-sklearn,predata/heroku-buildpack-scipy,amanjain/heroku-buildpack-python-with-django-bower,osharim/-heroku-buildpack-python,zakdoek/heroku-buildpack-django,sookasa/heroku-buildpack-python-pipeline,gitricko/apt-python-buildpack,tukutela/heroku-buildpack-python,mdz/heroku-buildpack-python,pebble/cloudpebble-buildpack,blazekadam/open2,minichate/heroku-buildpack-ldap,snapist/heroku-buildpack-python-opencv,arnfred/heroku-buildpack-python-hdf5-blas-lapack,skilljar/heroku-buildpack-python,HousekeepLtd/heroku-buildpack-python,kowito/python-buildpack,cloudfoundry/python-buildpack,orablu/heroku-buildpack,ad-m/heroku-buildpack-python,rapilabs/heroku-buildpack-python,tukutela/heroku-buildpack-python,jbenet/heroku-buildpack-python,rawWhipIT/p22-goldant-buildpack,rbtying/heroku-buildpack-python,jamarparris/heroku-buildpack-python-swig,lukaszkorecki/heroku-buildpack-python,jiaaro/heroku-buildpack-django,pmclanahan/heroku-buildpack-python-peep,craigkerstiens/gistlog,ianyh/heroku-buildpack-python-extras,mjumbewu/heroku-buildpack-python-no-node,apiaryio/heroku-buildpack-python-scons,liyanchang/cloudfoundary-buildbot-buildpack,ruscoder/heroku-buildpack-python-with-node,evnpr/herokupython,everysignalinc/heroku-buildpack-python-scikit-learn-git,maxcountryman/heroku-buildpack-python,chalkchisel/heroku-buildpack-bolster,mobify/heroku-buildpack-python-swig,orablu/heroku-buildpack,davidcbucher/heroku-buildpack-geo-python,ekkleesia2/heroku-buildpack-python,thenovices/heroku-buildpack-scipy,YoApp/heroku-buildpack-python-twemproxy,benjaminfox/heroku-buildpack-python-geoip,localmed/heroku-buildpack-python-extras,liyanchang/cloudfoundary-buildbot-buildpack,ruscoder/heroku-buildpack-python-with-node,drinks/heroku-buildpack-python-base,rollokb/heroku-buildpack-python,wbrefvem/heroku-buildpack-python,psrthegreat/heroku-buildpack-python-sklearn,mdz/heroku-buildpack-python,rajpurkar/heroku-buildpack-python-sklearn,guidowb/buildpack-python,kikin81/heroku-buildpack,samuelhavron/heroku-buildpack-python,everysignalinc/heroku-buildpack-python-scikit-learn-git,evnpr/herokupython,integricho/heroku-buildpack-python-ffmpeg2.1-with-codecs,markine/heroku-buildpack-python,ianyh/heroku-buildpack-python-nodejs,drinks/heroku-buildpack-python-scipy,joshisa/python-buildpack,samuelhavron/heroku-buildpack-python,ad-m/heroku-buildpack-python,ghhong1986/crfpp-python-buildpack-for-heroku,cirlabs/heroku-buildpack-geodjango,swils/heroku-buildpack-python,arnaudlimbourg/heroku-buildpack-python,galuszkak/heroku-buildpack-django,grivescorbett/heroku-buildpack-python,dbrgn/heroku-npscipy,lyft/heroku-buildpack-python-data,jimlindeman/python-buildpack-collectd,davidcbucher/heroku-buildpack-geo-python,maciejgryka/heroku-buildpack-spcedge,hsr-ba-fs15-dat/heroku-buildpack,mfenniak/heroku-buildpack-python-libffi,ephemerallabs/heroku-buildpack-python,wyn/heroku-buildpack-python,kennethjiang/heroku-buildpack-python-libffi,joshisa/python-buildpack,jms6520/cf-python,slorg1/heroku-buildpack-python,lyft/heroku-buildpack-python-data,craigkerstiens/gistlog,pkumar-appd/python-buildpack,dvreed/heroku-buildpack-python-ldap,brightforme/heroku-buildpack-python,davidcbucher/heroku-buildpack-geo-python,wyn/heroku-buildpack-python,buildingenergy/heroku-buildpack-python-leatherman,cloudControl/buildpack-python,guidowb/buildpack-python,buildingenergy/heroku-buildpack-python-leatherman,dbrgn/heroku-buildpack-python-sklearn,marcospy/heroku-buildpack-scipy,chalkchisel/heroku-buildpack-bolster,rawWhipIT/p22-goldant-buildpack,gaumire/heroku-buildpack-python,orablu/heroku-buildpack,Nazanin84/python-buildpack,jbenet/heroku-buildpack-python,kikin81/heroku-buildpack,HanSooloo/heroku-buildpack-python,integricho/heroku-buildpack-python-ffmpeg-lame,mtigas/heroku-buildpack-pypy,apiaryio/heroku-buildpack-python-scons,sookasa/heroku-buildpack-python-pipeline,joshowen/heroku-buildpack-python,heroku/heroku-buildpack-python,miraculixx/heroku-buildpack-python,cirlabs/heroku-buildpack-geodjango,SciDevs/heroku-buildpack-python-scikit-learn-git,RobertSundling/heroku-buildpack-python-nginx,liyanchang/buildbot-master-buildpack,rajpurkar/heroku-buildpack-python-sklearn,kowito/python-buildpack,guidowb/buildpack-python,nikita-pivovarov/heroku-buildpack-python-ldap,econchick/heroku-buildpack-python,kvarga/heroku-buildpack-python,ojacobson/heroku-buildpack-python,legnaleurc/heroku-buildpack-python,uniphil/heroku-buildpack-pythonsass,jvenezia/heroku-buildpack-python,doda/heroku-buildpack-python,orablu/heroku-buildpack,Brogency/heroku-buildpack-python-gulp,18F/python-buildpack,TipWander/heroku-buildpack-geodjango,codeforamerica/heroku-buildpack-pygeo,Gliimpse/heroku-buildpack-SWIG-python,davidcbucher/heroku-buildpack-geo-python,Nazanin84/python-buildpack,andrespires/python-buildpack,Scalingo/python-buildpack,benmurden/heroku-buildpack-python-ember,river-jade/heroku-buildpack-scipy,ianyh/heroku-buildpack-python-extras,kennethreitz/sphinx-buildpack,xica/heroku-buildpack-scipy,kennethjiang/heroku-buildpack-python-libffi,nwkotto/geodjango-buildpack-with-geos,Stibbons/heroku-buildpack-python-installer,andrespires/python-buildpack,mdz/heroku-buildpack-python,plangrid/heroku-buildpack-python,jms6520/cf-python,jiaaro/heroku-buildpack-django,agriffis/heroku-buildpack-python,osharim/-heroku-buildpack-python,SciDevs/heroku-buildpack-python-scikit-learn-git,integricho/heroku-buildpack-python-ffmpeg-lame,film42/heroku-buildpack-python-wkhtmltopdf,stalnacke/heroku-buildpack-python,everysignalinc/heroku-buildpack-python-scikit-learn-git,beni55/heroku-buildpack-python,dulaccc/heroku-buildpack-geodjango,mfenniak/heroku-buildpack-python-libffi,julienbou/heroku-buildpack-serpan,marcospy/hackathon-globo-app,dbrgn/heroku-npscipy,gitricko/apt-python-buildpack,minichate/heroku-buildpack-ldap,oberlin/heroku-buildpack-python,monological/heroku-buildpack-python-opencv,ianyh/heroku-buildpack-python-nodejs,driftyco/heroku-buildpack-sphinx,icoxfog417/heroku-buildpack-python,rajpurkar/heroku-buildpack-python-sklearn,film42/heroku-buildpack-python-wkhtmltopdf,ianyh/heroku-buildpack-python-extras,arnfred/heroku-buildpack-python-hdf5-blas-lapack,boardman/sphinx-buildpack,alexluke/heroku-buildpack-python-extras,mythmon/heroku-buildpack-python-nodejs,aldryn/heroku-buildpack-python,cloudfoundry/python-buildpack,cdht/heroku-buildpack-python,joshisa/python-buildpack,econchick/heroku-buildpack-python,zakdoek/heroku-buildpack-django,AltSchool/heroku-buildpack-python,wbrefvem/heroku-buildpack-python,cloudfoundry/python-buildpack,incuna/heroku-buildpack-python-test,drinks/heroku-buildpack-python-base,blazekadam/opencv,kowito/python-buildpack,ianyh/heroku-buildpack-python-nodejs,benslavin/heroku-buildpack-python,loanzen/heroku-buildpack-python,lucasvo/heroku-buildpack-python-with-node,samuelhavron/heroku-buildpack-python,ghhong1986/crfpp-python-buildpack-for-heroku,craigkerstiens/gistlog,18F/python-buildpack,brianthomas/heroku-buildpack-textmining,buildingenergy/heroku-buildpack-python-leatherman,pwdel1/heroku-buildpack-scipy,Gliimpse/heroku-buildpack-SWIG-python,drinks/heroku-buildpack-python-base,cirlabs/heroku-buildpack-geodjango,edenspiekermann-amsterdam/heroku-buildpack-python,osharim/-heroku-buildpack-python,bolster/heroku-buildpack-bolster,lyft/heroku-buildpack-python-data,jbenet/heroku-buildpack-python,pkumar-appd/python-buildpack,samuelhavron/heroku-buildpack-python,DylanLukes/heroku-buildpack-python,cortexintel/heroku-buildpack-scipy,benslavin/heroku-buildpack-python,marianzange/heroku-buildpack-python,alexflanagan/operand-buildpack-python,papaeye/heroku-buildpack-python-bower,ywarezk/heroku-buildpack-geodjango,Apogaea/heroku-buildpack-python,mjumbewu/heroku-buildpack-python-no-node,ianyh/heroku-buildpack-python-opencv,sjtuadamyang/adamyang-buildpack-python-libjpeg,ianyh/heroku-buildpack-python-bower,alexflanagan/operand-buildpack-python,drinks/heroku-buildpack-python-scipy,buildbot/buildbot-master-buildpack,localmed/heroku-buildpack-python-extras,Tiger66639/buildbot-master-buildpack,galuszkak/heroku-buildpack-django,nicktimko/heroku-buildpack-scipy,samuelhavron/heroku-buildpack-python,swanson/heroku-buildpack-python-ortools,uniphil/heroku-buildpack-pythonsass,martingascon/heroku-buildpack-python,codeforamerica/heroku-buildpack-pygeo,joshfriend/heroku-buildpack-python,scrapinghub/scrapinghub-buildpack-scrapy,doda/heroku-buildpack-python,dubsmash/heroku-buildpack-python,psrthegreat/heroku-buildpack-python-sklearn,marcospy/hackathon-globo-app,mjumbewu/heroku-buildpack-python-no-node,samuelhavron/heroku-buildpack-python,bolster/heroku-buildpack-bolster,18F/python-buildpack,pkumar-appd/python-buildpack,andela-brotich/wger-buildpack-python,econchick/heroku-buildpack-python,gitricko/apt-python-buildpack,projetoeureka/heroku-buildpack-scipy,evnpr/herokupython,jimlindeman/python-buildpack-collectd,ruscoder/heroku-buildpack-python,manufacturedba/heroku-buildpack-python,bobsilverberg/heroku-buildpack-python-peep,arnfred/heroku-buildpack-python-hdf5-blas-lapack,AltSchool/heroku-buildpack-python,adamroth/heroku-buildpack-python-pdftk,heroku/heroku-buildpack-python,apiaryio/heroku-buildpack-python-scons,mfenniak/heroku-buildpack-python-libffi,jms6520/cf-python,dbrgn/heroku-buildpack-python-sklearn,WonderThink/heroku-buildpack-python-ffmpeg-geoip,jms6520/cf-python,drinks/heroku-buildpack-python-base,galuszkak/heroku-buildpack-django,localmed/heroku-buildpack-python-extras,igroff/heroku-buildpack-python,alexluke/heroku-buildpack-python-extras,ryanhiebert/heroku-buildpack-python,incuna/heroku-buildpack-python-test,legnaleurc/heroku-buildpack-python,aldryn/heroku-buildpack-python,soapril/heroku-buildpack-python,junyoed/heroku-buildpack-python,lucasvo/heroku-buildpack-python-with-node,resmio/heroku-buildpack-geodjango,liyanchang/cloudfoundary-buildbot-buildpack,drinks/heroku-buildpack-python-scipy,blazekadam/opencv,PerceptumNL/heroku-buildpack-python,craigkerstiens/gistlog,rawWhipIT/p22-goldant-buildpack,ianyh/heroku-buildpack-python-opencv,kennethjiang/heroku-buildpack-python-libffi,uniphil/heroku-buildpack-pythonsass,samuelhavron/heroku-buildpack-python,kikin81/heroku-buildpack,psrthegreat/heroku-buildpack-python-sklearn,edmorley/heroku-buildpack-python,benslavin/heroku-buildpack-python,vlidholt/heroku-buildpack-scipy,ianyh/heroku-buildpack-python-opencv,jimlindeman/python-buildpack-collectd,julienbou/heroku-buildpack-serpan,samuelhavron/heroku-buildpack-python,cclauss/heroku-buildpack-python