anchor.diff:  Target "Build" (fun _ ->
       !! solutionFile
       |> MSBuildReleaseExt "" [
  -            // "VisualStudioVersion", "14.0"
  -            // "ToolsVersion"       , "14.0"  
  +        // "VisualStudioVersion", "14.0"
  +        // "ToolsVersion"       , "14.0"  
       ] "Rebuild"
       |> ignore
   )
  
positive.code:         DotNetCli.Build (fun c ->
              { c with
                  Project = proj
                  ToolPath = dotnetExePath
              })
      )
  )
  
negative.code:     DotNetCli.Restore (fun c ->
          { c with
              Project = currentDirectory </> "tools" </> "tools.fsproj"
              // ToolPath = dotnetExePath 
          })
  )
  
  