.net core & Rider @ ubuntu: "There was no build tools found"

Hello,

I want to make .net core programs on ubuntu with Rider.

I installed dotnet-dev-1.0.0-rc4-004771 as instructed on the microsoft dotnet core website and started rider.

I can create a new .net core solution, but the project won't load. Instead the exception is thrown:

06:18 There was no build tools found
 --- EXCEPTION #1/2 [InvalidOperationException]
 Message = “There was no build tools found”
 ExceptionPath = Root.InnerException
 ClassName = System.InvalidOperationException
 HResult = COR_E_INVALIDOPERATION=80131509
 Source = JetBrains.Platform.ProjectModel.Host
 StackTraceString = “
 at JetBrains.ProjectModel.ProjectsHost.MsBuild.MsBuildSessionHolder.CreateSession () [0x00036] in <89f9ced7f00c4609896ee9789bfaae86>:0 
 at JetBrains.ProjectModel.ProjectsHost.MsBuild.MsBuildSessionHolder.RefreshSession () [0x00021] in <89f9ced7f00c4609896ee9789bfaae86>:0 
 at JetBrains.ProjectModel.ProjectsHost.MsBuild.MsBuildProjectHost.ClearCaches () [0x00000] in <89f9ced7f00c4609896ee9789bfaae86>:0 
 at JetBrains.ProjectModel.ProjectsHost.SolutionHost.Impl.SolutionHost.ReloadSolutionAndAllProjects () [0x0001b] in <89f9ced7f00c4609896ee9789bfaae86>:0 
 at JetBrains.ProjectModel.ProjectsHost.SolutionHost.Impl.SolutionHost.<Init>b__1 (System.Boolean args) [0x00010] in <89f9ced7f00c4609896ee9789bf... (show balloon)

Before I try every possible permutation of versions to be installed, I wanted to ask if someone could tell me which components I need to make this thing work.

I set up the VM yesterday, so all components are obtained at that time.

Appreciate the help