Build was failed when adding Prig assembly for 3rd party library.

[urasandesu]

When I added Prig assembly for 3rd party library, I got the following build error:

CS0234: The type or namespace name 'ComponentModel' does not exist in the namespace 'System' (are you missing an assembly reference?) [C:\Users\User\Documents\Visual Studio 2013\Projects\ConsoleApplication1\ConsoleApplication1Test\UntestableLibrary.v4.0.30319.v1.0.0.0.MSIL.Prig\UntestableLibrary.Prig.g.csproj]

I seem that UntestableLibrary.Prig.g.csproj doesn't have the assembly references other than Urasandesu.NAnonym, Urasandesu.Prig.Framework and stubbing assembly. The csproj file is here:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <OutputType>Library</OutputType>
    <RootNamespace>UntestableLibrary.Prig</RootNamespace>
    <FileAlignment>512</FileAlignment>
    <SignAssembly>False</SignAssembly>
    <AssemblyOriginatorKeyFile>
    </AssemblyOriginatorKeyFile>
    <OutputPath>C:\Users\User\Documents\Visual Studio 2013\Projects\ConsoleApplication1\ConsoleApplication1Test\bin\Debug\.</OutputPath>
    <DefineConstants>_M_MSIL;_NET_4</DefineConstants>
    <PlatformTarget>AnyCPU</PlatformTarget>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
    <AssemblyName>UntestableLibrary.v4.0.30319.v1.0.0.0.MSIL.Prig</AssemblyName>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Urasandesu.NAnonym">
      <HintPath>C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Urasandesu.NAnonym\v4.0_0.2.0.0__ce9e95b04334d5fb\Urasandesu.NAnonym.dll</HintPath>
    </Reference>
    <Reference Include="Urasandesu.Prig.Framework">
      <HintPath>C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Urasandesu.Prig.Framework\v4.0_0.1.0.0__acabb3ef0ebf69ce\Urasandesu.Prig.Framework.dll</HintPath>
    </Reference>
    <Reference Include="UntestableLibrary">
      <HintPath>C:\Users\User\Documents\Visual Studio 2013\Projects\ConsoleApplication1\Library\UntestableLibrary.dll</HintPath>
    </Reference>
  </ItemGroup>
  <ItemGroup>
    <Compile Include="**/*.cs" />
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>

Shouldn't it rather also have references for <stubbing assembly>.GetReferencedAssemblies()?