Cake build DotNet Core error - .net-core

Question

I'm trying build my solution with dotnet core using cake but I receive it:
C:\Program Files\dotnet\sdk\1.0.1\Sdks\Microsoft.NET.Sdk\build\Microsoft.NET.Sdk.Common.targets(73,5): error : Project 'xxx.csproj' targets '.NETCoreApp,Version=v1.1'. It cannot be referenced by a project that targets '.NETCoreApp,Version=v1.0'. [xxx.csproj]
What could be wrong?
If I run dotnet.exe build on cmd, the builds work normally
dotnet build xxx.csproj
Microsoft (R) Build Engine version 15.1.548.43366
Copyright (C) Microsoft Corporation. All rights reserved.
CouchDB.Driver.Core -> xxx.dll
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:01.50
Environment Machine
The xxx.csproj version is:
netcoreapp1.1
cake --version
Version 0.19.1+Branch.main.Sha.4c5b4fd5b1c4d9d36066ec78714027e26b211af4
dotnet.exe --version
1.0.1
dotnet.exe
Microsoft .NET Core Shared Framework Host
Version : 1.1.0
Build : 928f77c4bc3f49d892459992fb6e1d5542cb5e86

Answer 1

I forgot 2 things. The solution is:
Set correct framework in build.cake:
var settings = new DotNetCoreBuildSettings
{
Framework = "netcoreapp1.1",
Configuration = "Release",
OutputDirectory = "./build/"
};
DotNetCoreBuild("./src/", settings);
Restore NuGet packages using the DotNetCoreRestore instead nuget.exe
Task("Restore-NuGet-Packages")
.IsDependentOn("Clean")
.Does(() => {
DotNetCoreRestore("src"); // use it instead of NuGetRestore("./folder");
});
The result is:
Build
Executing task: Build
Microsoft (R) Build Engine version 15.1.548.43366
Copyright (C) Microsoft Corporation. All rights reserved.
CouchDB.Driver.Core -> xxx.dll
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:11.10
Finished executing task: Build