Getting "Unable to find package Microsoft.Build.NoTargets" and "error MSB4236: The SDK 'Microsoft.Build.NoTargets/1.0.85' specified could not be found."

[aybe]

I've been trying the following scenario:

https://github.com/microsoft/MSBuildForUnity/blob/master/Documentation/CoreScenarios.md#scenario-2-share-c-library-between-unity-projects

These are the errors I'm getting:

C:\Users\Aybe\source\repos\Spilskinanke\MSBuild\Projects\Spilskinanke.Dependencies.msb4u.g.props(22,3): error : Unable to find package Microsoft.Build.NoTargets. No packages exist with this id in source(s): MSBuildForUnity
UnityEngine.Debug:LogError (object)
Microsoft.Build.Unity.MSBuildProjectBuilder:LogProgressMessage (string,Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:385)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass13_0:<BuildProjects>b__1 (System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:213)
Microsoft.Build.Unity.MSBuildProjectBuilder/DelegateProgress`1<System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>>:Report (System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:516)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass14_0:<BuildProjectsAsync>b__1 (System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:330)
Microsoft.Build.Unity.MSBuildProjectBuilder/DelegateProgress`1<System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>:Report (System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:516)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass21_0:<ExecuteMSBuildAsync>b__0 (object,System.Diagnostics.DataReceivedEventArgs) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:462)
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()

C:\Users\Aybe\source\repos\Spilskinanke\MSBuild\Projects\Spilskinanke.Dependencies.msb4u.g.props(22,31): error MSB4236: The SDK 'Microsoft.Build.NoTargets/1.0.85' specified could not be found. [C:\Users\Aybe\source\repos\Spilskinanke\Assets\Spilskinanke.Dependencies.msb4u.csproj]
UnityEngine.Debug:LogError (object)
Microsoft.Build.Unity.MSBuildProjectBuilder:LogProgressMessage (string,Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:385)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass13_0:<BuildProjects>b__1 (System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:213)
Microsoft.Build.Unity.MSBuildProjectBuilder/DelegateProgress`1<System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>>:Report (System.ValueTuple`2<int, System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:516)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass14_0:<BuildProjectsAsync>b__1 (System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:330)
Microsoft.Build.Unity.MSBuildProjectBuilder/DelegateProgress`1<System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>>:Report (System.ValueTuple`2<string, Microsoft.Build.Unity.MSBuildProjectBuilder/ProgressMessageType>) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:516)
Microsoft.Build.Unity.MSBuildProjectBuilder/<>c__DisplayClass21_0:<ExecuteMSBuildAsync>b__0 (object,System.Diagnostics.DataReceivedEventArgs) (at Library/PackageCache/com.microsoft.msbuildforunity@0.9.2-20211109.1/Editor/ProjectBuilder/MSBuildProjectBuilder.cs:462)
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()

[jieseattle]

Same issue.
C:\Users\opal\Desktop\azure-object-anchors\quickstarts\apps\unity\mrtk\Assets> C:\Program Files\dotnet\dotnet.exe msbuild AOAMRTKApp.Dependencies.msb4u.csproj -restore -v:minimal -p:NuGetInteractive=true -t:Build -p:Configuration=Release C:\Users\opal\Desktop\azure-object-anchors\quickstarts\apps\unity\mrtk\MSBuild\Projects\AOAMRTKApp.Dependencies.msb4u.g.props(22,3): error : Unable to find package Microsoft.Build.NoTargets. No packages exist with this id in source(s): MSBuildForUnity

[RyanMilligan]

I ran into this as well while trying to get a project configured to use my shared library on a new laptop. It took a bunch of digging, but it appears to be caused by two problems:

1. Using an SDK other than .NET Core 2.1
2. Not using the globally configured NuGet packages
3. Never having restored a properly configured project that references the Microsoft.Build.NoTargets SDK

You can fix these issues with the following steps:

1. Open Assets\NuGet.config and comment out the <clear /> line
2. Add a global.json to a folder at or above the Unity project with the following contents:

{
  "sdk": {
    "version": "2.1.202"
  }
}

3. In Unity, click MSBuild -> Build All Projects

At this point, the project should build successfully without errors. Now that the SDK is safely downloaded to your local NuGet cache, you can delete global.json and put the <clear /> line back, and all should be well going forward on that machine. I'm not 100% sure that switching to the .NET Core SDK was actually necessary, so if someone could try just steps 1 and 3 and update here whether it worked or not, that would be much appreciated.