angerman changed the topic of #haskell.nix to: https://input-output-hk.github.io/haskell.nix - alternative haskell infrastructure for nix; logs at https://logs.nix.samueldr.com/haskell.nix
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<ptival[m]> anyone else not able to hit the cache at all? even on the most simple derivation, it's trying to build GHC :(
<__monty__> Maybe master's too recent?
<__monty__> Or you only have the cachix cache enabled?
<__monty__> Hercules is the only CI that's not green on current master so cachix is probably not fully (or not at all) populated.
<__monty__> Add hydra.iohk.io as a cache. There's kinks to be worked out when it comes to cachix.
<ptival[m]> I only have the cachix cache yes
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<michaelpj> yeah, add the hydra one (we do now recommend that in the docs but it's a recent addition!
<michaelpj> (also we really need to build all our doc snippet so we're sure they work :( )
<ptival[m]> cool works well with that cache!
<ptival[m]> and yeah I must have written my default.nix prior to that change :)
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<michaelpj> I think we may be able to use Hercules with the hydra cache in future which will put us back to one cache, which will help!
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<__monty__> michaelpj: Is the lag on the cachix cache because of Hercules failures or bugs?
<michaelpj> __monty__: we basically had to turn off all the Hercules agents because we got memory spikes breaking things, probably due to parallel evaluations, probably due to the haskell.nix memory usage during evaluation being really big. We haven't had time to fix things up again yet...
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<__monty__> Hmm, if it's because of haskell.nix's memory requirements why doesn't hydra exhibit the problem? Does Hercules parallelize a lot more?
<typetetris> And here I went and waited for all the GHCs to compile ...
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<angerman> __monty__: Hercules has conceptual proper support for IFDs
<michaelpj> yeah, Hydra is brutally serial in doing evaluations. Which is actually one of the problems we wanted to ameliorate with Hercules, except in this instance it ended up being a problem itself...
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