Hi Eric, Unfortunately, we could not get hold of the owners of the cachix so it is not available for ghc.nix anymore. It was, however, not going to significantly speed up ghc builds anyway, most of the dependencies for GHC builds are cached anyway and the most time is taken by building GHC ^^ Best Magnus On 7/27/26 12:11, Eric Macaulay via ghc-devs wrote:

Hello all,

I am trying to get up and running building GHC on Nix. Can I ask: how can one use cachix to speed up the build process? (I tried looking at https://gitlab.haskell.org/ghc/ghc.nix#cachix but could not find any helpful information.)

Regards, Eric Macaulay

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