Another hadrian option you might want to use

Alfredo Di Napoli alfredo.dinapoli at
Thu Oct 21 06:23:11 UTC 2021

Hello Matthew,

Perhaps it would be too niche of a resource, but what about collecting
these options either in a Wiki page in GHC or maybe a short blog post on
your website (if that's not the case already)? I personally use
`--flavour=default+no_profiled_libs+omit_pragmas` all the time with Hadrian
these days once you made me discover that magic incantation, but I am
essentially relying on my bash history or my search capabilities within
this mailing list.

I could imagine how other people might have missed your original email, and
it would be great if we could have this shared somewhere in a more
discoverable way.


On Wed, 20 Oct 2021 at 12:59, Matthew Pickering <matthewtpickering at>

> Hi,
> A recent change in the testsuite meant that we now running the haddock
> tests with hadrian, this means that haddocks for ghc/base get rebuilt
> if you modify anything in the compiler.
> This can decrease interaction speed. To disable the documentation
> tests from running use
> --docs=none
> This is similar to the flag which already skips performance tests:
> --skip-perf
> Cheers,
> Matt
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at
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