one more try to fix travis-CI.
one more try to fix travis-CI.

AndrewRademacher/wai,frontrowed/wai,awpr/wai,yesodweb/wai,AndrewRademacher/wai,AndrewRademacher/wai,coypoop/wai,ygale/wai,soenkehahn/wai,mfine/wai,sordina/wai,sordina/wai,jberryman/wai,beni55/wai,AndrewRademacher/wai,mfine/wai,soenkehahn/wai,dylex/wai,ygale/wai,iquiw/wai,awpr/wai,frontrowed/wai,utdemir/wai,creichert/wai,urbanslug/wai,beni55/wai,yesodweb/wai,frontrowed/wai,coypoop/wai,rgrinberg/wai,sol/wai,beni55/wai,rgrinberg/wai,tolysz/wai,sordina/wai,erikd/wai,soenkehahn/wai,sordina/wai,rgrinberg/wai,ygale/wai,dylex/wai,awpr/wai,tolysz/wai,sol/wai,erikd/wai,iquiw/wai,mfine/wai,utdemir/wai,coypoop/wai,mfine/wai,sol/wai,coypoop/wai,iquiw/wai,ygale/wai,awpr/wai,utdemir/wai,erikd/wai,tolysz/wai,urbanslug/wai,urbanslug/wai,urbanslug/wai,utdemir/wai,kazu-yamamoto/wai,erikd/wai,dylex/wai,creichert/wai,iquiw/wai,rgrinberg/wai,beni55/wai,tolysz/wai,soenkehahn/wai,dylex/wai,frontrowed/wai,jberryman/wai,kazu-yamamoto/wai,jberryman/wai,rgrinberg/wai,jberryman/wai