在visual studio团队服务托管的生成代理上的.net v5.4项目中生成dapper时出错

我最近建立了一个非常基本的.net web项目，并在我的存储库中使用dapper访问数据库。它在我的本地计算机上运行和构建都没有错误，但当我尝试在VSTS上构建时，我收到一个错误，说某些软件包与.net framework v5.4或v5.0不兼容（尝试了一些不同的框架来尝试构建它。）

这是一个包含dapper的project.json文件。这在我的计算机上本地构建和恢复没有任何问题：

      {
    "version": "1.0.0-*",
    "description": "ProjectPOC.Core.Implementations Class Library",
    "authors": [ "CBergeron" ],
    "tags": [ "" ],
    "projectUrl": "",
    "licenseUrl": "",
    "dependencies": {
      "ProjectPOC.Core.Infrastructure": "",
      "ProjectPOC.Core.Models": "",
      "Microsoft.Extensions.OptionsModel": "1.0.0-rc1-final",
      "Dapper": "1.50.0-beta9"
    },
    "frameworks": {
      "net451": {
        "dependencies": {
        }
      },
      "dotnet5.4": {
        "dependencies": {
          "Microsoft.CSharp": "4.0.1-beta-23516",
          "System.Collections": "4.0.11-beta-23516",
          "System.Linq": "4.0.1-beta-23516",
          "System.Runtime": "4.0.21-beta-23516",
          "System.Threading": "4.0.11-beta-23516"
        }
      }
    }
  }

当这个项目在VSTS托管的构建代理上构建时，我正在运行这里常用的预安装.ps1脚本：

# bootstrap DNVM into this session.
  "bootstrapping dnvminstall..."
  &{$Branch='dev';iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/aspnet/Home/dev/dnvminstall.ps1'))}
   "finished bootstrapping"
   "Loading global.json"
  # load up the global.json so we can find the DNX version
  $globalJson = Get-Content -Path $PSScriptRoot'global.json -Raw -ErrorAction Ignore | ConvertFrom-Json -ErrorAction Ignore
  "finished loading global.json"  

  if($globalJson)
  {
      $dnxVersion = $globalJson.sdk.version
    "setting DNX version.. to $dnxVersion "
  }
  else
  {
      Write-Warning "Unable to locate global.json to determine using 'latest'"
      $dnxVersion = "latest"
  }
  # install DNX
  # only installs the default (x86, clr) runtime of the framework.
  # If you need additional architectures or runtimes you should add additional calls
  # ex: & $env:USERPROFILE'.dnx'bin'dnvm install $dnxVersion -r coreclr
  "installing DNX"
  & $env:USERPROFILE'.dnx'bin'dnvm install $dnxVersion -Persistent
  #& $env:USERPROFILE'.dnx'bin'dnvm install $dnxVersion -r clr
  #& $env:USERPROFILE'.dnx'bin'dnvm install $dnxVersion -r coreclr
  #& $env:USERPROFILE'.dnx'bin'dnvm use $dnxVersion
  & $env:USERPROFILE'.dnx'bin'dnvm list
    "finished DNX install  "

    "DNU restoring....."
   # run DNU restore on all project.json files in the src folder including 2>1 to redirect stderr to stdout for badly behaved tools
  Get-ChildItem -Path $PSScriptRoot'src -Filter project.json -Recurse | ForEach-Object { & dnu restore $_.FullName 2>1 }
  #dnu restore
  "finsihed DNU restore"  

这个脚本基于构建日志安装以下dnx，它与我在本地机器上的dnvm列表相匹配：

2016-05-19T03:45:19.1014995Z installing DNX
    2016-05-19T03:45:19.9042850Z Downloading dnx-clr-win-x86.1.0.0-rc1-update2 from https://www.nuget.org/api/v2
    2016-05-19T03:45:22.7176602Z Installing to C:'Users'buildguest'.dnx'runtimes'dnx-clr-win-x86.1.0.0-rc1-update2
    2016-05-19T03:45:22.7766619Z Adding C:'Users'buildguest'.dnx'runtimes'dnx-clr-win-x86.1.0.0-rc1-update2'bin to process PATH
    2016-05-19T03:45:22.8456619Z Adding C:'Users'buildguest'.dnx'runtimes'dnx-clr-win-x86.1.0.0-rc1-update2'bin to user PATH
    2016-05-19T03:45:22.8826599Z Native image generation (ngen) is skipped. Include -Ngen switch to turn on native image generation to improve application startup time.
    2016-05-19T03:45:23.0276682Z Active Version           Runtime Architecture OperatingSystem Alias
    2016-05-19T03:45:23.0346603Z ------ -------           ------- ------------ --------------- -----
    2016-05-19T03:45:23.0356615Z   *    1.0.0-rc1-update2 clr     x86          win                  
    2016-05-19T03:45:23.0586614Z finished DNX install  
    2016-05-19T03:45:23.0596622Z DNU restoring.....
    2016-05-19T03:45:23.2796607Z Microsoft .NET Development Utility Clr-x86-1.0.0-rc1-16609
    2016-05-19T03:45:23.4785866Z   GET https://api.nuget.org/v3/index.json
    2016-05-19T03:45:23.5821917Z   OK https://api.nuget.org/v3/index.json 123ms
    2016-05-19T03:45:23.6261910Z   GET https://www.myget.org/F/aspnetvnext/api/v2/
    2016-05-19T03:45:24.4737562Z   OK https://www.myget.org/F/aspnetvnext/api/v2/ 847ms
    2016-05-19T03:45:24.4787560Z   GET https://www.myget.org/F/aspnetmaster/
    2016-05-19T03:45:25.1793928Z   OK https://www.myget.org/F/aspnetmaster/ 700ms

在它完成从nuget的恢复后，在构建过程中，它会为包含dapper的包库和引用它的任何东西抛出这样的错误：

       Unable to resolve dependency System.Collections.NonGeneric 4.0.1-rc2-24027
 ...
 2016-05-19T03:47:01.3562201Z ##[error]Platform'POC'ProjectPOC.Web.API'src'ProjectPOC.Core.Implementations'project.json(0,0): Error NU1002: The dependency System.Collections.NonGeneric 4.0.1-rc2-24027 in project ProjectPOC.Core.Implementations does not support framework .NETPlatform,Version=v5.4.
 2016-05-19T03:47:01.3602187Z      5>C:'a'1's'Platform'POC'ProjectPOC.Web.API'src'ProjectPOC.Core.Implementations'project.json : error NU1002: The dependency System.Collections.NonGeneric 4.0.1-rc2-24027 in project ProjectPOC.Core.Implementations does not support framework .NETPlatform,Version=v5.4. [C:'a'1's'Platform'POC'ProjectPOC.Web.API'src'ProjectPOC.Core.Implementations'ProjectPOC.Core.Implementations.xproj]

同样，这是在VS2015中从我的本地机器完美地构建、运行、部署到azure等，所以我觉得这与托管的构建代理有关，它是dnx/dnvm/nuget设置。是否有什么需要添加到构建代理中，或者需要对dnvm/nuget安装进行操作，以获得所有内容的正确版本？我还将nuget.config上传到了构建代理，但这也无济于事。我可以根据要求提供更多日志。

我的本地dnvm列表如下：

  Active Version           Runtime Architecture OperatingSystem Alias
  ------ -------           ------- ------------ --------------- -----
         1.0.0-beta8       clr     x64          win
         1.0.0-beta8       coreclr x64          win
         1.0.0-beta8       coreclr x86          win
         1.0.0-rc1-update1 clr     x64          win
         1.0.0-rc1-update1 clr     x86          win
         1.0.0-rc1-update1 coreclr x64          win
         1.0.0-rc1-update1 coreclr x86          win
    *    1.0.0-rc1-update2 clr     x86          win             default

如果有人能提供任何帮助，或者之前在使用新的.net东西时遇到过类似的问题，请提前感谢。