在带有.NET核心和框架混合解决方案的Azure Devops中，蛋糕构建脚本失败

我的.NET服务器项目有一个蛋糕构建脚本，该脚本需要在新的Azure DevOps管道上构建。该脚本在本地可用，但不适用于Azure DevOps。造成这种情况的可能原因可能是我在.NET Core 2.1上构建了一个单元测试项目（xUnit），而解决方案中的所有其他项目都是.NET Framework 4.6.1（我们刚刚在xUnit项目中添加了我唯一的选项是将其添加为.NET Core项目）。

我写了我的蛋糕脚本，该脚本在本地有效。看起来像这样：

//Always lock down versions of tools so that we can ensure a tool works before upgrading instead of auto-upgrading.
#tool "nuget:?package=xunit.runner.console&version=2.4.1"
#tool "nuget:?package=ReportUnit&version=1.2.1"

var target = Argument("target", "Build");
var configuration = Argument("configuration", "Dev");
var solution = @".\MyCompany.MyProduct.IntegrationLayer.sln";
var report = Directory(@".\reports");
var xunitReport = report + Directory("xunit");

Task("Clean")
    .Does(() =>
{
    Information("Cleaning out directories {0} for {1}...", configuration, solution);
        CleanDirectories("./**/bin/" + configuration);
        CleanDirectories("./**/obj/" + configuration);
});

Task("Restore")
    .IsDependentOn("Clean")
    .Does(() =>
{
    //This can restore both .NET Core and Framework NuGet packages.
    Information("Restoring Nuget packages for {0}...", solution);
    DotNetCoreRestore();
});

Task("Build")
    .IsDependentOn("Restore")
    .Does(() =>
{
    //If we change all the projects and solution to .NET Core, then we will need to change this build call to DotNetCoreBuild().
    //Because we have a mixed solution (unit tests are .NET Core and all other projects are .NET Framework), we need to still use MSBuild.
    Information("Building solution {0} using the {1} configuration...", solution, configuration);
    MSBuild(solution, new MSBuildSettings {
        Configuration = configuration
    });
});

Task("UnitTests")
    .IsDependentOn("Build")
    .Does(() =>
{
    Information("Unit testing solution {0} using the {1} configuration...", solution, configuration);
    var projects = GetFiles("./UnitTests/*.csproj");
    foreach(var project in projects)
    {
        DotNetCoreTest(
            project.FullPath,
            new DotNetCoreTestSettings()
            {
                Configuration = configuration,
                NoBuild = true
            });
    }
});

Task("UnitTestsOnly")
    .Does(() =>
{
    Information("Unit testing solution {0} using the {1} configuration...", solution, configuration);
    var projects = GetFiles("./UnitTests/*.csproj");
    foreach(var project in projects)
    {
        DotNetCoreTest(
            project.FullPath,
            new DotNetCoreTestSettings()
            {
                Configuration = configuration,
                NoBuild = true
            });
    }
});

RunTarget(target);

现在，当我在Azure DevOps中运行此代码时，每个项目都会出现10个错误，类似于下面的示例：

"D:\a\1\s\PPIL\MyCompany.MyProduct.IntegrationLayer.sln" (Build target) (1) ->
"D:\a\1\s\PPIL\MC.MP.IL.DatabaseDataReset\MC.MP.IL.DatabaseDataReset.csproj" (default target) (11) ->
  D:\a\1\s\PPIL\MC.MP.IL.DatabaseDataReset\MC.MP.IL.DatabaseDataReset.csproj(123,5): error : This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is ..\packages\Microsoft.VisualStudio.SlowCheetah.3.1.66\build\Microsoft.VisualStudio.SlowCheetah.targets.

我不确定确切的问题。可能是因为我们有一个混合项目。可能是因为文件结构。我不知道需要在cake命令中设置哪些选项或设置以进行构建或还原。也可能是当我在本地运行时，它在Cake脚本的同一文件夹中运行，但是它似乎在我的仓库的根文件夹中运行，该文件夹是此解决方案的解决方案文件夹中的一个文件夹。

我的脚本哪里出问题了？我的还原步骤似乎很好，除了它只还原UnitTests项目（它确实取决于所有其他项目）。是还原吗？在构建或还原中是否缺少我的设置？提前致谢。