[Close #744] Run check in current env.
[Close #744] Run check in current env.


ericboehs/heroku-buildpack-ruby,Scalingo/ruby-buildpack,instacart/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,zunda/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,makifund/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,Scalingo/ruby-buildpack,heroku/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,Genius/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,ericboehs/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,brightbytes/heroku-buildpack-ruby-without-assets-precompile,Genius/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,orenyk/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll