"This package may not be fully compatible with your project" incorrectly reported as error in Omnisharp

[sudsy]

Hi have a project targeting dotnetcore 2.0 which references a netfx assembly.

When I compile it with dotnet build I receive the following warning:

warning NU1701: Package 'Apache.NMS.ActiveMQ 1.7.2' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETStandard,Version=v2.0'. This package may not be fully compatible with your project.

When I load the project with vscode and omnisharp, the warning is promoted to an error and it generates a popup notification.

Error: Package 'Apache.NMS.ActiveMQ 1.7.2' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETStandard,Version=v2.0'. This package may not be fully compatible with your project.

This seems to be related to a similar issue on the ominisharp-vscode repo dotnet/vscode-csharp#2110