When running the NuGet pack command I get the error: 'AutoMapper' already has a dependency defined for 'NETStandard.Library'

Question

I'm having an issue packaging my own nuget package, which includes AutoMapper 5.0.2. This is only producing an error within the Visual Studio Team Services (VSTeam) Build servers.

My project is using .NET 4.6.1

Any ideas on how to fix?

Here is the error:

2016-07-08T23:46:44.5801667Z C:\LR\MMS\Services\Mms\TaskAgentProvisioner\Tools\agents\1.102.0\agent\worker\tools\NuGet.exe pack "C:\a\1\s\Project.csproj" -OutputDirectory "C:\a\1\s\Project\bin\release" -Properties Configuration=release -IncludeReferencedProjects 
2016-07-08T23:46:45.0458195Z MSBuild auto-detection: using msbuild version '14.0' from 'C:\Program Files (x86)\MSBuild\14.0\bin'.
2016-07-08T23:46:45.0468395Z Attempting to build package from 'Project.csproj'.
2016-07-08T23:46:45.1942694Z Packing files from 'C:\a\1\s\Project\bin\Release'.
2016-07-08T23:46:45.3942642Z ##[error]**'AutoMapper' already has a dependency defined for 'NETStandard.Library'.**
2016-07-08T23:46:45.4142626Z ##[error]System.Exception: Unexpected exit code 1 returned from tool NuGet.exe
2016-07-08T23:46:45.4152639Z ##[error] at Microsoft.TeamFoundation.DistributedTask.Task.Internal.PowerShell.InvokeToolCmdlet.ProcessRecord()
2016-07-08T23:46:45.4152639Z ##[error] at System.Management.Automation.CommandProcessor.ProcessRecord()

I also opened an issue on GitHub: https://github.com/AutoMapper/AutoMapper/issues/1499

Answer 1

You need to install new Nuget version for your visual studio version.

Get it from here Nuget gallery

Answer 2

I was able to fix/workaround the issue by putting a PowerShell script in to download the latest NuGet. Then I pointed all of the NuGet tasks to this new nuget.exe. Pros: builds are working again, Cons: each build downloads NuGet again, causing unnecessary load on NuGet.org.

Here is my PowerShell:

$sourceNugetExe = "https://dist.nuget.org/win-x86-commandline/latest/nuget.exe"
$targetNugetExe = "$(build.sourcesdirectory)/nuget.exe"
Invoke-WebRequest $sourceNugetExe -OutFile $targetNugetExe
Set-Alias nuget $targetNugetExe -Scope Global -Verbose
nuget