Customer using userlocal maui install unable to find maui workloads

[marcpopMSFT]

Copied the text from here for @anpin I felt we should have a new issue tracking this since the original userlocal issue was addressed as far as I know (the code is in the RC2 branch and we have confirmation of it working).
#37706 (comment)
#41735 (comment)

For me RC2 does not fix it. Exactly the same as before.

> dotnet --info
.NET SDK:
 Version:           9.0.100-rc.2.24474.11
 Commit:            315e1305db
 Workload version:  9.0.100-manifests.4872d5d5
 MSBuild version:   17.12.0-preview-24473-03+fea15fbd1

Runtime Environment:
 OS Name:     nixos
 OS Version:  24.11
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /nix/store/ckjmw8ahlv89vhn76rdqb04r7xkngz9c-dotnet-sdk-9.0.100-rc.2.24474.11/sdk/9.0.100-rc.2.24474.11/

.NET workloads installed:
 [maui-android]
   Installation Source: SDK 9.0.100-rc.2
   Manifest Version:    9.0.0-rc.2.24503.2/9.0.100-rc.2
   Manifest Path:       /home/a/.dotnet/sdk-manifests/9.0.100-rc.2/microsoft.net.sdk.maui/9.0.0-rc.2.24503.2/WorkloadManifest.json
   Install Type:        FileBased

Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.0-rc.2.24473.5
  Architecture: x64
  Commit:       990ebf52fc

.NET SDKs installed:
  9.0.100-rc.2.24474.11 [/nix/store/fa8svf3jpqs5jpx9jmigkvcpc7vflyqx-dotnet-core-combined/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.0-rc.2.24474.3 [/nix/store/fa8svf3jpqs5jpx9jmigkvcpc7vflyqx-dotnet-core-combined/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.0-rc.2.24473.5 [/nix/store/fa8svf3jpqs5jpx9jmigkvcpc7vflyqx-dotnet-core-combined/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/nix/store/fa8svf3jpqs5jpx9jmigkvcpc7vflyqx-dotnet-core-combined]

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download
> dotnet workload list

Installed Workload Id      Manifest Version                     Installation Source
-----------------------------------------------------------------------------------
maui-android               9.0.0-rc.2.24503.2/9.0.100-rc.2      SDK 9.0.100-rc.2

Use `dotnet workload search` to find additional workloads to install.

> dotnet build
  Determining projects to restore...
/nix/store/ckjmw8ahlv89vhn76rdqb04r7xkngz9c-dotnet-sdk-9.0.100-rc.2.24474.11/sdk/9.0.100-rc.2.24474.11/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): error NETSDK1147: To build this project, the following workloads must be installed: maui-android [/home/a/projects/maui-on-nix/src/MauiOnNix.csproj::TargetFramework=net8.0-android]
/nix/store/ckjmw8ahlv89vhn76rdqb04r7xkngz9c-dotnet-sdk-9.0.100-rc.2.24474.11/sdk/9.0.100-rc.2.24474.11/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): error NETSDK1147: To install these workloads, run the following command: dotnet workload restore [/home/a/projects/maui-on-nix/src/MauiOnNix.csproj::TargetFramework=net8.0-android]

Build FAILED.

/nix/store/ckjmw8ahlv89vhn76rdqb04r7xkngz9c-dotnet-sdk-9.0.100-rc.2.24474.11/sdk/9.0.100-rc.2.24474.11/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): error NETSDK1147: To build this project, the following workloads must be installed: maui-android [/home/a/projects/maui-on-nix/src/MauiOnNix.csproj::TargetFramework=net8.0-android]
/nix/store/ckjmw8ahlv89vhn76rdqb04r7xkngz9c-dotnet-sdk-9.0.100-rc.2.24474.11/sdk/9.0.100-rc.2.24474.11/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): error NETSDK1147: To install these workloads, run the following command: dotnet workload restore [/home/a/projects/maui-on-nix/src/MauiOnNix.csproj::TargetFramework=net8.0-android]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:00.76
> ls -al $DOTNET_ROOT/metadata/workloads/9.0.100/userlocal
.r--r--r-- 0 root 31 Dec  1969 /nix/store/fa8svf3jpqs5jpx9jmigkvcpc7vflyqx-dotnet-core-combined/metadata/workloads/9.0.100/userlocal

[marcpopMSFT]

@anpin can you confirm that the workload manifests for maui are installed in the sdk-manifests folder and that there are maui packs installed in the dotnet\packs folder?

I'm wondering if the packs are installed in one location but we're looking for them in a different location. @tmds @dsplaisted is there an environment variable that controls the location of the userlocal packs lookup? I recall there was.

[tmds]

@anpin can you check if having two userlocal files as described in #37706 (comment) makes the command work?

[anpin]

thanks for pointing out the workaround @tmds! Somehow I missed it in the previous discussion. Creating userlocal in the directory relative to the dotnet bin allowed me to install workload and restore the project, but not build it yet. However the error is unrelated, so I guess we can close this issue

[tmds]

@marcpopMSFT @dsplaisted The issue is specific to the NixOS packaging. The .NET root is split across different directories which are then combined through symlinks. Due do this split, the SDK ends up looking for the userlocal file at the wrong place.

@anpin will someone be addressing this in the NixOS packaging?

[anpin]

The .NET root is split across different directories which are then combined through symlinks.

You don't have to do that, only if one wish to use multiple versions of SDK at the same time.

will someone be addressing this in the NixOS packaging?

I can't answer for the whole community, but in my opinion this have to be worked around by end-user until we can get a reproducible solution to install workloads (there were previous attempts at this).

I will publish fully working nix shell example for dotnet maui-android once I fix dynamic linking in dotnet android sdk, but the issue with missing workloads has been resolved.

[anpin]

working nixos shell for dotnet-android / maui

https://github.com/anpin/maui-on-nix/blob/main/shell.nix

[marcpopMSFT]

Sounds like you got workloads unblocked. Thanks for the help on this one tmds