paket.reference to recognizing github packages in paket.lock file

Description

The paket.dependencies file is:

source https://www.nuget.org/api/v2

github fsprojects/Argu

Repro steps

1. Create a F# Windows console application using VS 2015/17 Community Edition (OS: Windows 2008 R2)
2. Perform paket init
3. Create paket.dependencies file with the following contents:

source https://www.nuget.org/api/v2

github fsprojects/Argu

4. Create paket.references file in project with contents:
   Argu
5. Perform paket update (or paket install) from VS menu or commandline

Expected behavior

Argu would now exist as a reference within the project containing the aforementioned paket.reference file.

Actual behavior

The following error message is display (and is not completely represented in VS Error List when install or update is performed from VS' paket menu):

Paket failed with
-> Installation Errors :
    - <...full path to project...>\paket.references uses NuGet package Argu, but it was not found in the paket.lock file in group Main.

Known workarounds

clone the projects and manually link them into your solutions...ignoring paket.

Reproduce the issue with the shown paket.dependencies and paket.references contents, then run paket update or paket install and inspect how the paket.references entry is matched against paket.lock. Done means the GitHub package fsprojects/Argu is recognized from paket.lock and added as a project reference without the reported installation error.