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Nix + dotnet

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9 Aug 2025
@oatmealraisin:matrix.orgoatmealraisin Made a quick default.nix with the main buildDotnetModule, no more tools issues, thanks for the help! 00:46:50
@oatmealraisin:matrix.orgoatmealraisinWould it be worth it to add this info to the documentation?00:56:23
@oatmealraisin:matrix.orgoatmealraisinAlso, I'm not sure what happened, but a bunch of the WebAssembly related deps (for a blazor/razor part of the project) were a minor version off, I needed to manually change a bunch from 8.0.17 to 8.0.18. Any idea why this might have happened?01:01:53
@oatmealraisin:matrix.orgoatmealraisin Also, now I'm running into another issue wrt wasm, error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'browser-wasm'., I've seen some others having problems with this 01:05:52
@gggkiller:matrix.orgGGGyeah, you probably have to install the wasm workload and I don't think we support that currently01:22:50
@gggkiller:matrix.orgGGGunless if homedir workload installation got re-enabled recently01:23:09
@oatmealraisin:matrix.orgoatmealraisin I'm also getting this error intermittently, error MSB4018: System.IO.IOException: The process cannot access the file '/build/y0lpd34wqi3vwms9ci0i5yq4mq90sz23-source/src/Infrastructure/bin/Release/net8.0/Infrastructure.deps.json' because it is being used by another process. 01:24:11
@oatmealraisin:matrix.orgoatmealraisinNot sure what to make of that01:24:16
@oatmealraisin:matrix.orgoatmealraisinngl I do not know what this means01:24:30
@corngood:corngood.comCorngood
In reply to @oatmealraisin:matrix.org
I'm also getting this error intermittently, error MSB4018: System.IO.IOException: The process cannot access the file '/build/y0lpd34wqi3vwms9ci0i5yq4mq90sz23-source/src/Infrastructure/bin/Release/net8.0/Infrastructure.deps.json' because it is being used by another process.
I think that's usually if you're building a solution file with concurrency. 		01:29:24
@oatmealraisin:matrix.orgoatmealraisinIs concurrency on by default?01:30:20
@corngood:corngood.comCorngoodYeah, unless `enableParallelBuilding = false`. There's documentation somewhere about why that's not safe in all cases, but I haven't found it yet...01:32:38
@oatmealraisin:matrix.orgoatmealraisinI must've glanced over it too fast, I thought it was off by default. I'll change that. I'm also not making derivations for every projectreference yet..01:34:36
@oatmealraisin:matrix.orgoatmealraisinHey! The whole thing just built01:35:15
@oatmealraisin:matrix.orgoatmealraisin It doesn't run because it needs selfContainedBuild but just getting to this point is great. Corngood thanks again for the help 01:59:20
@corngood:corngood.comCorngood
In reply to @oatmealraisin:matrix.org
I must've glanced over it too fast, I thought it was off by default. I'll change that. I'm also not making derivations for every projectreference yet..

stdenv is off by default, buildDotnetModule is on by default...

I think some other languages did the same because they don't have the legacy of stdenv.

The documentation I was talking about was the concurrent solution building problem, but that's an upstream dotnet thing.

02:04:20
@corngood:corngood.comCorngood

For some reason I can't find any reference now, but I seem to remember the problem was with solution files specifically causing the same project to be build twice concurrently when there's a diamond dependency. I think it had something to do with the target framework or runtime being used as well.

There are a bunch of packages that work around it. For example openutau:

  # [...]/Microsoft.NET.Sdk.targets(157,5): error MSB4018: The "GenerateDepsFile" task failed unexpectedly. [[...]/OpenUtau.Core.csproj]
  # [...]/Microsoft.NET.Sdk.targets(157,5): error MSB4018: System.IO.IOException: The process cannot access the file '[...]/OpenUtau.Core.deps.json' because it is being used by another process. [[...]/OpenUtau.Core.csproj]
  enableParallelBuilding = false;

  projectFile = "OpenUtau.sln";
02:19:29
13 Aug 2025
@whovian9369:matrix.orgWhovian9369

Hi, me again. Sorry
A friend is trying to use AoT with his app, and I can't figure out for the life of me how to have selfContained = false; (which he insists has to be false) and use the AoT at the same time due to the following. Any thoughts?

...
@nix { "action": "setPhase", "phase": "installPhase" }
Executing dotnetInstallHook
/build/nuget.yzA66y/fallback/microsoft.dotnet.ilcompiler/9.0.7/build/Microsoft.NETCore.Native.Publish.targets(56,5): error : PublishTrimmed is implied by native compilation and cannot be disabled. [/build/gx7q6dmvpva0fphxrx9dkj7yyyx1yl43-source/GrindCore.PerfTest.csproj]

Anyone have any suggestions on what to do next?

17:18:25

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