Unable to find fallback package folder

Steps to reproduce

1. Start with a clean Windows box and install Visual Studio Enterprise 2017 (latest) with .NET Core.
2. Clone https://github.com/azure/azure-iot-sdk-csharp and run jenkins\windows_csharp.cmd in root.

Expected behavior

Builds works as expected.

Actual behavior

BUILD: --- SecurityProvider for TPM Debug ---
Microsoft (R) Build Engine version 15.6.82.30579 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018: The "ResolvePackageDependencies" task failed unexpectedly. [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018: NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder 'C:\Users\cipop\.dotnet\NuGetFallbackFolder'. [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 fallbackPackageFolders) [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile, String projectPath) [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageDependencies.get_PackageResolver() [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageDependencies.ResolvePackagePath(LockFileLibrary package) [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageDependencies.GetPackageAndFileDefinitions() [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.NET.Build.Tasks.TaskBase.Execute() [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() in E:\A\_work\82\s\src\Build\BackEnd\TaskExecutionHost\TaskExecutionHost.cs:line 631 [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]
C:\Program Files\dotnet\sdk\2.1.101\Sdks\Microsoft.NET.Sdk\build\Microsoft.PackageDependencyResolution.targets(172,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__25.MoveNext() in E:\A\_work\82\s\src\Build\BackEnd\Components\RequestBuilder\TaskBuilder.cs:line 787 [S:\cs\security\tpm\src\Microsoft.Azure.Devices.Provisioning.Security.Tpm.csproj]

Environment data

dotnet --info output:

dotnet --info
.NET Command Line Tools (2.1.101)

Product Information:
 Version:            2.1.101
 Commit SHA-1 hash:  6c22303bf0

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.16299
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.1.101\

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.6
  Build    : 74b1c703813c8910df5b96f304b0f2b78cdf194d

There is something interesting in the Users folder:

USERNAME=cipop
USERPROFILE=C:\Users\cipop.CORP

> dir c:\Users\ /b
Administrator
cipop
cipop.CORP
Public

Seems to be related to dotnet/sdk#8578, dotnet/sdk#8536, dotnet/sdk#8578, dotnet/sdk#8680 .

[VictorioBerra]

If you are using Docker and getting this error, make sure you have a .dockerignore and do not copy over the bin and obj files.

**/bin
**/obj
**/out
**/.vscode
**/.vs
.dotnet
.Microsoft.DotNet.ImageBuilder

VIA: https://github.com/dotnet/dotnet-docker/blob/master/.dockerignore

[CIPop]

Workaround:

mkdir C:\Users\cipop\.dotnet\NuGetFallbackFolder