Ignore -C when not unregisterised (reported on ghc-users)
Ignore -C when not unregisterised (reported on ghc-users)

TomMD/ghc,ml9951/ghc,siddhanathan/ghc,gridaphobe/ghc,fmthoma/ghc,hferreiro/replay,spacekitteh/smcghc,TomMD/ghc,siddhanathan/ghc,jstolarek/ghc,tjakway/ghcjvm,mettekou/ghc,ekmett/ghc,da-x/ghc,wxwxwwxxx/ghc,green-haskell/ghc,mcschroeder/ghc,gridaphobe/ghc,forked-upstream-packages-for-ghcjs/ghc,oldmanmike/ghc,sgillespie/ghc,ml9951/ghc,lukexi/ghc-7.8-arm64,oldmanmike/ghc,spacekitteh/smcghc,siddhanathan/ghc,gridaphobe/ghc,vikraman/ghc,nkaretnikov/ghc,nomeata/ghc,sdiehl/ghc,olsner/ghc,gcampax/ghc,frantisekfarka/ghc-dsi,nathyong/microghc-ghc,vikraman/ghc,forked-upstream-packages-for-ghcjs/ghc,forked-upstream-packages-for-ghcjs/ghc,sgillespie/ghc,GaloisInc/halvm-ghc,olsner/ghc,sgillespie/ghc,ghc-android/ghc,olsner/ghc,ezyang/ghc,sdiehl/ghc,TomMD/ghc,gcampax/ghc,ryantm/ghc,sgillespie/ghc,nushio3/ghc,siddhanathan/ghc,mcschroeder/ghc,jstolarek/ghc,nathyong/microghc-ghc,vikraman/ghc,nomeata/ghc,ekmett/ghc,spacekitteh/smcghc,siddhanathan/ghc,ryantm/ghc,ml9951/ghc,vTurbine/ghc,ghc-android/ghc,christiaanb/ghc,anton-dessiatov/ghc,frantisekfarka/ghc-dsi,mettekou/ghc,snoyberg/ghc,tjakway/ghcjvm,ml9951/ghc,ezyang/ghc,holzensp/ghc,vikraman/ghc,TomMD/ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,fmthoma/ghc,AlexanderPankiv/ghc,forked-upstream-packages-for-ghcjs/ghc,vikraman/ghc,wxwxwwxxx/ghc,nushio3/ghc,sdiehl/ghc,ekmett/ghc,AlexanderPankiv/ghc,GaloisInc/halvm-ghc,lukexi/ghc-7.8-arm64,gcampax/ghc,sgillespie/ghc,fmthoma/ghc,christiaanb/ghc,AlexanderPankiv/ghc,mfine/ghc,gcampax/ghc,AlexanderPankiv/ghc,shlevy/ghc,frantisekfarka/ghc-dsi,acowley/ghc,elieux/ghc,christiaanb/ghc,mfine/ghc,mfine/ghc,nathyong/microghc-ghc,snoyberg/ghc,hferreiro/replay,mfine/ghc,ezyang/ghc,sdiehl/ghc,wxwxwwxxx/ghc,nkaretnikov/ghc,nathyong/microghc-ghc,lukexi/ghc-7.8-arm64,shlevy/ghc,vTurbine/ghc,ekmett/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,oldmanmike/ghc,jstolarek/ghc,urbanslug/ghc,ghc-android/ghc,oldmanmike/ghc,vTurbine/ghc,anton-dessiatov/ghc,tibbe/ghc,nathyong/microghc-ghc,christiaanb/ghc,frantisekfarka/ghc-dsi,hferreiro/replay,oldmanmike/ghc,vikraman/ghc,fmthoma/ghc,lukexi/ghc,ryantm/ghc,mettekou/ghc,vTurbine/ghc,gcampax/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,spacekitteh/smcghc,siddhanathan/ghc,holzensp/ghc,sdiehl/ghc,nkaretnikov/ghc,nkaretnikov/ghc,urbanslug/ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,mfine/ghc,nushio3/ghc,tjakway/ghcjvm,nushio3/ghc,holzensp/ghc,acowley/ghc,anton-dessiatov/ghc,nushio3/ghc,shlevy/ghc,christiaanb/ghc,ezyang/ghc,ryantm/ghc,nathyong/microghc-ghc,mcschroeder/ghc,tjakway/ghcjvm,urbanslug/ghc,da-x/ghc,lukexi/ghc-7.8-arm64,anton-dessiatov/ghc,oldmanmike/ghc,green-haskell/ghc,tjakway/ghcjvm,lukexi/ghc,ghc-android/ghc,forked-upstream-packages-for-ghcjs/ghc,mfine/ghc,TomMD/ghc,snoyberg/ghc,AlexanderPankiv/ghc,urbanslug/ghc,lukexi/ghc,holzensp/ghc,da-x/ghc,christiaanb/ghc,nomeata/ghc,mcschroeder/ghc,gridaphobe/ghc,mettekou/ghc,da-x/ghc,snoyberg/ghc,mfine/ghc,christiaanb/ghc,olsner/ghc,green-haskell/ghc,green-haskell/ghc,acowley/ghc,anton-dessiatov/ghc,hferreiro/replay,vTurbine/ghc,tibbe/ghc,acowley/ghc,da-x/ghc,gridaphobe/ghc,olsner/ghc,vikraman/ghc,urbanslug/ghc,elieux/ghc,green-haskell/ghc,oldmanmike/ghc,anton-dessiatov/ghc,acowley/ghc,mettekou/ghc,tjakway/ghcjvm,sgillespie/ghc,elieux/ghc,lukexi/ghc,elieux/ghc,tibbe/ghc,nkaretnikov/ghc,ekmett/ghc,shlevy/ghc,forked-upstream-packages-for-ghcjs/ghc,nushio3/ghc,mcschroeder/ghc,gridaphobe/ghc,spacekitteh/smcghc,ghc-android/ghc,fmthoma/ghc,acowley/ghc,da-x/ghc,GaloisInc/halvm-ghc,vTurbine/ghc,elieux/ghc,GaloisInc/halvm-ghc,vTurbine/ghc,fmthoma/ghc,shlevy/ghc,urbanslug/ghc,urbanslug/ghc,acowley/ghc,lukexi/ghc,ezyang/ghc,ml9951/ghc,TomMD/ghc,sdiehl/ghc,mettekou/ghc,snoyberg/ghc,anton-dessiatov/ghc,GaloisInc/halvm-ghc,elieux/ghc,bitemyapp/ghc,ghc-android/ghc,ezyang/ghc,mettekou/ghc,lukexi/ghc-7.8-arm64,olsner/ghc,ghc-android/ghc,nushio3/ghc,ryantm/ghc,ml9951/ghc,ml9951/ghc,bitemyapp/ghc,TomMD/ghc,bitemyapp/ghc,gcampax/ghc,holzensp/ghc,snoyberg/ghc,snoyberg/ghc,nomeata/ghc,tibbe/ghc,elieux/ghc,wxwxwwxxx/ghc,tibbe/ghc,jstolarek/ghc,nathyong/microghc-ghc,siddhanathan/ghc,gcampax/ghc,hferreiro/replay,ml9951/ghc,mcschroeder/ghc,bitemyapp/ghc,GaloisInc/halvm-ghc,jstolarek/ghc,sgillespie/ghc,fmthoma/ghc,forked-upstream-packages-for-ghcjs/ghc,ezyang/ghc,shlevy/ghc,shlevy/ghc,mcschroeder/ghc,hferreiro/replay,wxwxwwxxx/ghc,bitemyapp/ghc,olsner/ghc,AlexanderPankiv/ghc,frantisekfarka/ghc-dsi,gridaphobe/ghc,da-x/ghc,nomeata/ghc,hferreiro/replay