If you use the node package in a project that has a Directory.Build.props or Directory.build.targets file in its root, the settings in those files control the compilation of the packages c# code. For instance, if nullable is enabled for the solution using the package, the csproj files will fail to build as they aren't nullable aware.
If you use the node package in a project that has a Directory.Build.props or Directory.build.targets file in its root, the settings in those files control the compilation of the packages c# code. For instance, if nullable is enabled for the solution using the package, the csproj files will fail to build as they aren't nullable aware.