update-report: default Caskroom moved to prefix.
update-report: default Caskroom moved to prefix.

Look at HOMEBREW_PREFIX rather than HOMEBREW_REPOSITORY for the default
Caskroom location.

Homebrew/brew,claui/brew,amar-laksh/brew_sudo,Homebrew/brew,bfontaine/brew,reitermarkus/brew,DomT4/brew,Homebrew/brew,muellermartin/dist,claui/brew,bfontaine/brew,mahori/brew,JCount/brew,muellermartin/dist,gregory-nisbet/brew,EricFromCanada/brew,vitorgalvao/brew,Linuxbrew/brew,konqui/brew,EricFromCanada/brew,mgrimes/brew,ilovezfs/brew,gregory-nisbet/brew,DomT4/brew,konqui/brew,aw1621107/brew,EricFromCanada/brew,tonyg/homebrew,konqui/brew,ilovezfs/brew,vitorgalvao/brew,pseudocody/brew,zmwangx/brew,mgrimes/brew,gregory-nisbet/brew,nandub/brew,hanxue/linuxbrew,nandub/brew,sjackman/homebrew,sjackman/homebrew,pseudocody/brew,maxim-belkin/brew,muellermartin/dist,mahori/brew,Homebrew/brew,mgrimes/brew,amar-laksh/brew_sudo,tonyg/homebrew,EricFromCanada/brew,reelsense/brew,JCount/brew,Linuxbrew/brew,mahori/brew,maxim-belkin/brew,MikeMcQuaid/brew,reelsense/brew,Linuxbrew/brew,alyssais/brew,rwhogg/brew,JCount/brew,DomT4/brew,alyssais/brew,reitermarkus/brew,konqui/brew,vitorgalvao/brew,nandub/brew,sjackman/homebrew,hanxue/linuxbrew,hanxue/linuxbrew,reitermarkus/brew,aw1621107/brew,MikeMcQuaid/brew,sjackman/homebrew,palxex/brew,Linuxbrew/brew,DomT4/brew,rwhogg/brew,bfontaine/brew,jmsundar/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,JCount/brew,rwhogg/brew,jmsundar/brew,tonyg/homebrew,zmwangx/brew,mahori/brew,zmwangx/brew,palxex/brew,jmsundar/brew,maxim-belkin/brew,palxex/brew,ilovezfs/brew,pseudocody/brew,reelsense/brew,claui/brew,claui/brew,nandub/brew,aw1621107/brew,amar-laksh/brew_sudo,reitermarkus/brew,vitorgalvao/brew,alyssais/brew