Take a look at https://cssvariableshim.azurewebsites.net/ and try it out there.
Install-Package CSSVariableShim -Version 1.0.419
dotnet add package CSSVariableShim --version 1.0.419
<PackageReference Include="CSSVariableShim" Version="1.0.419" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add CSSVariableShim --version 1.0.419
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
This package has no dependencies.
This package is not used by any popular GitHub repositories.