Add a '-j' flag for the 'install' command.
Add a '-j' flag for the 'install' command.

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