Restauração do Nuget via servidor de compilação "incapaz de encontrar a versão"

Eu tenho uma solução VS e, como parte de um TeamCity Build, restauramos pacotes de um feed NuGet privado (myget) e público (nuget.org). A maioria dos pacotes é restaurada corretamente, mas fica abaixo dos pacotes abaixo para WebApi e Mono.Security. Tudo isso está funcionando localmente no Visual Studio.

[restore] NuGet command: C:\TeamCity\buildAgent\plugins\nuget-agent\bin\JetBrains.TeamCity.NuGetRunner.exe C:\TeamCity\buildAgent\tools\NuGet.CommandLine.DEFAULT.nupkg\tools\NuGet.exe restore C:\TeamCity\buildAgent\work\953bd084b49f7d88\DataFinch.Web.sln -Source https://www.myget.org/F/datafinch/auth/<hidden>/api/v2 -Source https://api.nuget.org/v3/index.json
[11:41:35][restore] Starting: C:\TeamCity\buildAgent\temp\agentTmp\custom_script473789219385667038.cmd
[11:41:35][restore] in directory: C:\TeamCity\buildAgent\work\953bd084b49f7d88
[11:41:35][restore] JetBrains TeamCity NuGet Runner 8.0.37059.9
[11:41:35][restore] Registered additional extensions from paths: C:\TeamCity\buildAgent\plugins\nuget-agent\bin\plugins-2.8
[11:41:35][restore] Starting NuGet.exe 2.8.50926.602 from C:\TeamCity\buildAgent\tools\NuGet.CommandLine.DEFAULT.nupkg\tools\NuGet.exe
[11:41:43][restore] Unable to find version '5.2.3' of package 'Microsoft.AspNet.WebApi.Client'.
[11:41:43][restore] Unable to find version '5.2.3' of package 'Microsoft.AspNet.WebApi.Core'.
[11:41:43][restore] Unable to find version '3.2.3.0' of package 'Mono.Security'.
[11:41:43][restore] Unable to find version '6.0.4' of package 'Newtonsoft.Json'.
[11:41:43][restore] Process exited with code 1

Configuração do Teamcity:

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