Error: To build this project, the following workloads must be installed: android

[3sRykaert]

Description

Since today I'm getting errors on a build of a .Net Maui project which targets Android:
##[error]C:\Program Files\dotnet\sdk\10.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): Error NETSDK1147: To build this project, the following workloads must be installed: android
The weird thing is: I'm targeting .Net 9 and the error complains about .Net 10.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 22.04
• Ubuntu 24.04
• Ubuntu Slim
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

Current image version: '20251125.125.1' (same for Windows Server 2022 & 2025)

Is it regression?

worked until yesterday (which is 12/03/2025)

Expected behavior

Build working

Actual behavior

Build failing

Repro steps

The dotnet command is:
dotnet publish some.csproj -f net9.0-android

[ivosnoza]

It doesn't complain about .NET10, image just uses this .NET version by default.
Anyways, just add one Command Line Task step before build steps

steps:
- script: 'dotnet workload install maui'
  displayName: 'Install MAUI'

This should work for you.

[Corpelijn]

I was facing the same issue. The suggestion of @ivosnoza does seem to work, but why is it necessary all of a sudden? There has not been an update to the windows image.

[shamil-mubarakshin]

Hey @3sRykaert, .NET 10 has been included into the image.
Since you didn't provide much info on your use case for us to reproduce the issue, could you try workload installation suggestion above or test using UseDotNet@2 task.

    - task: UseDotNet@2
      displayName: .NET Version
      inputs:
        version: '9.0.x'

[3sRykaert]

Thanks @ivosnoza I got it working again with adding a dotnet buildstep with the following properties (the blacked out is the path of the android (maui) csproj file)

@shamil-mubarakshin why this sudden change? Why ain't "mobile-maui-stuff" (ios, android) not integrated anymore?

[msystems-ole]

We have the same problem. It started after the runner image was updated to '20251125.125.1' - the last good build in our pipeline before this used image version '20251102.87.1' (windows-2022), and I agree that the difference must be due to the addition of .NET 10.

The error message suggested dotnet workload restore, which didn't work. We also tried upgrading our MAUI 9 project to MAUI 10, with no effect.

It doesn't complain about .NET10, image just uses this .NET version by default. Anyways, just add one Command Line Task step before build steps

steps:
- script: 'dotnet workload install maui'
  displayName: 'Install MAUI'

This should work for you.

This works for us, although it adds 2 minutes to the build time.

Hey @3sRykaert, .NET 10 has been included into the image. Since you didn't provide much info on your use case for us to reproduce the issue, could you try workload installation suggestion above or test using UseDotNet@2 task.

- task: UseDotNet@2
  displayName: .NET Version
  inputs:
    version: '9.0.x'

This runs much faster than workload install, but it doesn't work. I've tried both version: '9.0.x' and 10.0.x (corresponding to the original MAUI 9 project and with the upgraded MAUI 10 project).

---

Placing script: dotnet workload list before and after dotnet workload install maui shows the workloads before:

Workload version: 10.0.100-manifests.4c0ca8ba

Installed Workload Id      Manifest Version                         Installation Source
---------------------------------------------------------------------------------------
android                    36.0.0-rc.2.332/10.0.100-rc.2            VS 17.14.36717.8   
ios                        26.0.10970-net10-rc.2/10.0.100-rc.2      VS 17.14.36717.8   
maccatalyst                26.0.10970-net10-rc.2/10.0.100-rc.2      VS 17.14.36717.8   
maui-windows               10.0.0-rc.2.25504.7/10.0.100-rc.2        VS 17.14.36717.8   
wasm-tools                 10.0.100/10.0.100                        VS 17.14.36717.8   

And after:

Workload version: 10.0.100.1

Installed Workload Id      Manifest Version         Installation Source
-----------------------------------------------------------------------
android                    36.1.2/10.0.100          VS 17.14.36717.8   
ios                        26.1.10494/10.0.100      VS 17.14.36717.8   
maccatalyst                26.1.10494/10.0.100      VS 17.14.36717.8   
maui                       10.0.0/10.0.100          SDK 10.0.100       
maui-windows               10.0.0/10.0.100          VS 17.14.36717.8   
wasm-tools                 10.0.100/10.0.100        VS 17.14.36717.8   

[3sRykaert]

@msystems-ole this adds one minute to your build time and works for me (no need to specify android/ios nor .net version)
dotnet workload restore path-to-csproj-file

[shamil-mubarakshin]

@shamil-mubarakshin why this sudden change? Why ain't "mobile-maui-stuff" (ios, android) not integrated anymore?

@3sRykaert, .NET core SDKs are installed with defaults, without installing extra workloads and both 9* and 10* contains android workload. Discrepancy between 9* and 10* might come from the Visual Studio workloads related to various SDKs, which we cant control.

Placing script: dotnet workload list before and after dotnet workload install maui shows the workloads before: And after:

@msystems-ole, there is an external issue dotnet/sdk#51850 related to rc.2 workloads installed by default.

[3sRykaert]

@shamil-mubarakshin why this sudden change? Why ain't "mobile-maui-stuff" (ios, android) not integrated anymore?

@3sRykaert, .NET core SDKs are installed with defaults, without installing extra workloads and both 9* and 10* contains android workload. Discrepancy between 9* and 10* might come from the Visual Studio workloads related to various SDKs, which we cant control.

are you sure about that? The error literally says it is not installed:
##[error]C:\Program Files\dotnet\sdk\10.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.ImportWorkloads.targets(38,5): Error NETSDK1147: To build this project, the following workloads must be installed: android

[shamil-mubarakshin]

You haven't provided us with repro steps or sample project. At the moment my assumption is that dotnet publish some.csproj -f net9.0-android on default .NET 10 should fail.
For further troubleshooting, provide us with the workflow/sample project where this issue is reproduced.