How to teach Hadrian not to build ghctags and haddock

I switched to Hadrian. Normally I hack somewhere in the compiler. So I use "hadrian/build.sh --flavour=devel2 --freeze1" to quickly rebuild GHC after some little changes to the code. It normally builds - library 'ghc' (Stage1, way v) - program 'ghctags' (Stage1) - program 'ghc-bin' (Stage1) - program 'haddock' (Stage1) When hacking GHC, I never use ghctags or haddock. Building ghctags is very fast, 1-2 seconds. However building haddock takes 15 to 20 seconds. Is there a way to teach hadrian not to build haddock and ghctags? Many thanks! Roland