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I've been developing a side project (a small web app). I'm developing on a Macbook M1 Pro, however, I need to compile it to test against a linux/amd64 environment. I'm trying to use docker for that. I know it is emulated via VM in this case and performance will suffer, but it's not a big deal for me since it's just a toy project.

I'm using stack as build tool and GHC 9.6.

The stack build command errors, hinting that it could be out of memory.

root@c5f07dbd83dc:/opt/app# stack build --fast -j 4 --allow-different-user
...
Error: [S-7282]
       Stack failed to execute the build plan.

       While executing the build plan, Stack encountered the error:

       [S-7011]
       While building package rinha-0.1.0.0 (scroll up to its section to see the error) using:
       /root/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_6HauvNHV_3.10.3.0_ghc-9.6.5 --verbose=1 --builddir=.stack-work/dist/x86_64-linux/ghc-9.6.5 build lib:rinha exe:rinha-exe --ghc-options " -fdiagnostics-color=always"
       Process exited with code: ExitFailure (-9) (THIS MAY INDICATE OUT OF MEMORY)

Initially, I thought it really could be out of memory as I'm using colima and had default configuration. Then I started colima giving it 4 CPUs and 16GiB memory:

$ colima start --cpu 4 --memory 16 -a x86_64 -t vz --vz-rosetta

Tried again, but no success!

The project starts building, stays like that for almost 1h, and then this error happens.

I wouldn't like to spin up a server just to build a project that I will be running on my laptop, but I see myself without alternatives and I'm finding it weird since I never had such a problem with other languages and it's the first time I see it while doing some Haskell.

Any tips?

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  • Can you verify whether it is indeed running out of memory? If so, you may be able to improve things by reducing the number of children (perhaps stack supports -j1 or similar?) and/or by asking GHC to run with a smaller heap (with +RTS -A4G or similar, though I don't know whether the usual GHC installations have RTS options enabled). Commented Jul 12, 2024 at 18:24
  • I know this is a horrible "use a different tool" style comment, but I have had an easy time cross compiling using nix in the past. It might require more effort than solving the problem by plugging away at the current solution path, just a thought. Commented Jul 13, 2024 at 8:42
  • Thanks for the tip @DanielWagner. I set the flags, but no luck. So I decided to remove one level of abstraction to give it a try with lima instead of colima and it worked! I ran limactl start template://docker --arch x86_64 and did a docker-compose build and all went well. Commented Jul 14, 2024 at 21:04
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