SolvedHome error NU1403: The package Microsoft.CSharp.4.0.1 sha512 validation failed.

I'm trying to add nuget 4.9 lock files, but I get the error:

/src/Serialization.Test/Froto.Serialization.Test.fsproj : error NU1403: The package Microsoft.CSharp.4.0.1 sha512 validation failed. The package is different than the last restore. [/src/Froto.sln]

Steps to reproduce:
Checkout the lock branch from ctaggart/froto#104, then restore using docker:

docker run -it --rm -v ${PWD}:/src -w /src bash
dotnet restore Froto.sln

My hunch is that the nuget is NuGetFallbackFolder is causing problems. It includes nuget packages that don't match WHY DOES IT HAVE PACKAGES THAT DON'T MATCH NUGET.ORG?

The Froto.Serialization.Test.fsproj has a lock to:

      "Microsoft.CSharp": {
        "type": "Transitive",
        "resolved": "4.0.1",
        "contentHash": "eEgt/ktABPBa/1xBex3M6b7C4dYsGQ0HWuwe9Xhflgu4cvn4a5VvFSLj5vyTKkp+hKrVpTRdqTXDTAxsIL1Reg==",

It matches what is downloaded from

  "version": 1,
  "contentHash": "eEgt/ktABPBa/1xBex3M6b7C4dYsGQ0HWuwe9Xhflgu4cvn4a5VvFSLj5vyTKkp+hKrVpTRdqTXDTAxsIL1Reg=="

The docker image NuGetFallbackFolder contentHash does not match:

root@0366cb41b8b4:/src# cat /usr/share/dotnet/sdk/NuGetFallbackFolder/microsoft.csharp/4.0.1/.nupkg.metadata
  "version": 1,
  "contentHash": "17h8b5mXa87XYKrrVqdgZ38JefSUqLChUQpXgSnpzsM0nDOhE40FTeNWOJ/YmySGV6tG6T8+hjz6vxbknHJr6A=="

At least the NuGetFallbackFolder on my Windows PC matches the docker image:

C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.csharp\4.0.1\.nupkg.metadata
  "version": 1,
  "contentHash": "17h8b5mXa87XYKrrVqdgZ38JefSUqLChUQpXgSnpzsM0nDOhE40FTeNWOJ/YmySGV6tG6T8+hjz6vxbknHJr6A=="

Is there a way to disable NuGetFallbackFolder from the lock check? I tried this without luck:


If you are going to continue shipping NuGet packages in NuGetFallbackFolder, can you make sure they match

28 Answers

✔️Accepted Answer

My mistake was not locking down my NuGet sources with a NuGet.Config, which had this one enabled: Microsoft Visual Studio Offline Packages, but probably better to lock down your the sources with NuGet.Config:

<?xml version="1.0" encoding="utf-8"?>
    <clear />
    <add key="" value="" protocolVersion="3" />

The DisableImplicitNuGetFallbackFolder of true is required for the restore to work correctly in docker. Here is my working Directory.Build.props:


I then best to clear all the local nuget caches and regenerate the lock files.

dotnet nuget locals all --clear
git clean -xfd
git rm **/packages.lock.json -f
dotnet restore Froto.sln

It is working now for me. Some of the hash's don't make sense to me still, but at least it is consistent across platforms when you take the NuGetFallbackFolder's completely out of the picture.

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