Referencing netstandard Library from net471 Project Results in Compilation Error

Steps to Reproduce

1. Start a new net471 project on linux (Linux Mint 19.2) with mono-complete installed.
2. Add a reference to any netstandard library (I chose Microsoft.AspNetCore.Server.Kestrel)
3. Build it FrameworkPathOverride=/usr/lib/mono/4.7.1-api dotnet build
4. Resulting in X.cs(6,5): error CS0012: The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'

See my repo thefringeninja/mono-repro@b2f01c4 for a reproduction. In addition, I 'fixed' it at thefringeninja/mono-repro@0baabde but this is something I would rather avoid:

1. sudo ln -s /usr/lib/mono/4.7.1-api/Facades/netstandard.dll /usr/lib/mono/4.7.1-api/netstandard.dll
2. add <Reference Include="netstandard" /> to the project.

Current Behavior

Doesn't compile

Expected Behavior

Does compile

On which platforms did you notice this

[ ] macOS [x] Linux [ ] Windows

Version Used:

~$ mono --version
Mono JIT compiler version 6.0.0.334 (tarball Thu Sep 12 21:34:14 UTC 2019)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          yes(600)
	Suspend:       hybrid
	GC:            sgen (concurrent by default)