GitVersion.MsBuild pack bug. Basically including GitVersion.MsBuild when IsPackable=false, then calling dotnet pack on the project makes it fail to build.
dotnet pack fails because GitVersion does not generate the GitVersionInformation.g.cs file:
C:\Users\cdonnelly\.nuget\packages\gitversion.msbuild\5.6.11\tools\GitVersion.MsBuild.targets(110,9): error : DirectoryNotFoundException: Could not find a part of the path 'D:\temp\marklar\obj\Debug\GitVersionInformation.g.cs'. [D:\temp\marklar\marklar.csproj]