Fix USES_NPM conditional
Fix USES_NPM conditional

okgrow/meteor-buildpack-horse,Alveoli/meteor-buildpack-horse,henrikgs/meteor-buildpack-horse,AdmitHub/meteor-buildpack-horse,smartphoneorchestra/heroku-buildpack-meteor-ffmpeg-lame,makalu/meteor-buildpack-horse,sabon/great-balls-of-fire,spozi/meteor-buildpack-horse,emadurandal/meteor-buildpack-horse,tab00/prebuiltdeploy,simonv3/meteor-buildpack-horse,premosystems/meteor-buildpack-horse,sabon/great-balls-of-fire,dheerajbhaskar/meteor-buildpack-horse-without-mongolab,stepri/meteor-buildpack-horse,RocketChat/heroku-buildpack-meteor,makrem025/meteor-buildpack-horse,tdenovan/meteor-buildpack-horse,rolltapeinc/meteor-buildpack-horse,eJugnoo/meteor-buildpack-horses,webantic/meteor-buildpack-horse,domo-lab/meteor-buildpack-horse,vmtung/heroku-meteor-buildpack,dalloro/meteor-buildpack-pony,sabon/great-balls-of-fire,dashersw/meteor-buildpack-horse,hexsprite/meteor-buildpack-horse,jad11v/meteor-buildpack-horse,samjoch/meteor-buildpack-horse,forwarder/meteor-buildpack-horse,lirbank/meteor-buildpack-horse