Clarify an error message.
Clarify an error message.

trskop/cabal,thoughtpolice/cabal,sopvop/cabal,headprogrammingczar/cabal,plow-technologies/cabal,typelead/epm,gridaphobe/cabal,thomie/cabal,seereason/cabal,rimmington/cabal,mmakowski/cabal,bennofs/cabal,plumlife/cabal,trskop/cabal,randen/cabal,corngood/cabal,valderman/cabal,Heather/cabal,ian-ross/cabal,eric-stanley/cabal,mightybyte/cabal,plow-technologies/cabal,enolan/cabal,beni55/cabal,fugyk/cabal,rimmington/cabal,lukexi/cabal,ghc-android/cabal,headprogrammingczar/cabal,Peaker/cabal,mmakowski/cabal,seereason/cabal,lukexi/cabal,gbaz/cabal,Helkafen/cabal,sopvop/cabal,plumlife/cabal,martinvlk/cabal,valderman/cabal,typelead/epm,gbaz/cabal,kolmodin/cabal,mydaum/cabal,themoritz/cabal,garetxe/cabal,edsko/cabal,mightybyte/cabal,christiaanb/cabal,corngood/cabal,fpco/cabal,triplepointfive/cabal,themoritz/cabal,sopvop/cabal,bennofs/cabal,thomie/cabal,eric-stanley/cabal,anton-dessiatov/cabal,anton-dessiatov/cabal,randen/cabal,x-y-z/cabal,themoritz/cabal,christiaanb/cabal,thoughtpolice/cabal,ian-ross/cabal,Peaker/cabal,x-y-z/cabal,kolmodin/cabal,beni55/cabal,triplepointfive/cabal,fpco/cabal,enolan/cabal,Helkafen/cabal,edsko/cabal,mydaum/cabal,Heather/cabal,kosmikus/cabal,fugyk/cabal,ghc-android/cabal,martinvlk/cabal,gridaphobe/cabal,garetxe/cabal,kosmikus/cabal