Those errors in both logs seem fairly odd. The first one appears to be mostly a missing libgmp, the second one looks like hsc2hs's template file is missing, however hadrian should have a rule for that.

You can try to clean your tree and rebuild.

git clean -xfd
git submodule foreach git clean -xfd
git submodule update --init --recursive

./boot && ./configure
cabal v2-update
hadrian/build -j --flavour=Quick/boot

In general the instructions on https://ghc.dev are pretty good.

Cheers,

Moritz

On Mon, Sep 20, 2021 at 8:50 AM Solomon Bothwell <ssbothwell@gmail.com> wrote:

Hi. I'm a Haskell developer and I have recently started exploring and building GHC, mainly with the hope of writing some small MRs for base.

I use nixos and ghc.nix to setup a build environment. Last week I was able to build `ghc-8.10.7-release` with no trouble. I'm not sure what may have happened but I am unable to build either `ghc-8-10.7-release` or `master` this week. I tried deleting my fork and creating a new one but am getting the same results.

For `master` I get this error: https://gist.github.com/ssbothwell/9693a919c521decf52503e9152b879b6
For `ghc-8.10.7-release` I get this error: https://gist.github.com/ssbothwell/fb5c418b4ee509cf0ad95d4337381e9e

I hope this is the right venue to be asking for help on this. Would it be better for me to write an issue on the ghc.nix github page?

Thanks,
Solomon.
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