Linux: Unable to find fallback package folder 'C:\Program Files\dotnet\sdk\NuGetFallbackFolder'

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I have a sample Ocelot gateway service built using Dotnet Core Web API V3.1. I have build the solution in Windows machine using "dotnet clean and dotnet build" which works fine. I'm trying to do the same in Ubuntu 18.04 LTS machine through Jenkins which is causing the below issue. 

/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: The "ResolvePackageAssets" task failed unexpectedly. [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder 'C:\Program Files\dotnet\sdk\NuGetFallbackFolder'. [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 fallbackPackageFolders) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(IEnumerable`1 packageFolders) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheWriter..ctor(ResolvePackageAssets task) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader.CreateReaderFromDisk(ResolvePackageAssets task, Byte[] settingsHash) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader..ctor(ResolvePackageAssets task) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ReadItemGroups() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ExecuteCore() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.TaskBase.Execute() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
     1>Done Building Project "/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj" (Clean target(s)) -- FAILED.

Build FAILED.

       "/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj" (Clean target) (1) ->
       (ResolvePackageAssets target) ->
         /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: The "ResolvePackageAssets" task failed unexpectedly. [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder 'C:\Program Files\dotnet\sdk\NuGetFallbackFolder'. [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 fallbackPackageFolders) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(IEnumerable`1 packageFolders) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheWriter..ctor(ResolvePackageAssets task) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader.CreateReaderFromDisk(ResolvePackageAssets task, Byte[] settingsHash) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader..ctor(ResolvePackageAssets task) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ReadItemGroups() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ExecuteCore() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.TaskBase.Execute() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]
       /usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [/var/lib/jenkins/workspace/GatewaySample_SERVICE/GatewaySample/GatewaySample.csproj]

Kindly let me know what am I missing here?

Note: I have another linux machine where I have the same setup (but Dotnet Core V2.2) where I could able to build the API through Jenkins.

PS: Below is the content from .csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <RootNamespace>GatewaySample_SERVICE</RootNamespace>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="IdentityServer4.AccessTokenValidation" Version="3.0.1" />
    <PackageReference Include="Ocelot" Version="14.0.11" />
  </ItemGroup>

</Project>
visual-studio-2019 jenkins-pipeline ubuntu-18.04 .net-core jenkins
1 Answers

I had similar issue when moving from Windows environment to WSL environment.
I did not find any reference to the missing directory in project files thus I searched the fallback plugin folder references in the whole project directory hierarchy and found it only in bin/ and obj/ folders.
After deleting all the bin/ and obj/ folders from the projects I was able to build them under WSL.

user_77294860
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