Devops Nuget versioning byBuildNumber does not work - azure-devops

Question

I want the version numbers of the Nuget package to be incremented and human readable with every version pushed to the Artifacts store. This is my yaml.
variables:
feedName : 'MyNugets'
buildConfiguration: 'release'
name: $(Year:yyyy).$(Month).$(DayOfMonth).$(Rev:.r)
pool:
vmImage: windows-latest
steps:
- task: DotNetCoreCLI#2
displayName: 'Build'
inputs:
command: 'build'
projects: '**/*.csproj'
arguments: '--configuration $(buildConfiguration)'
- task: DotNetCoreCLI#2
displayName: 'Pack'
inputs:
command: pack
versioningScheme: byBuildNumber
- task: NuGetAuthenticate#1
displayName: 'NuGet Authenticate'
- task: NuGetCommand#2
displayName: 'NuGet push'
inputs:
command: push
publishVstsFeed: '$(feedName)'
allowPackageConflicts: true
Whatever suggestion I could find on SO or other google result. None of them seems to be working. I always get this error.
##[error]Could not find version number data in the following environment variable: BUILD_BUILDNUMBER. The value of the variable should contain a substring with the following formats: X.Y.Z or X.Y.Z.A where A, X, Y, and Z are positive integers.
Any suggestions ?

Answer 1

Don't store the name in a variable, put in in a separate section above variables.
name: $(Year:yyyy).$(Month).$(DayOfMonth).$(Rev:.r)
variables:
feedName : 'MyNugets'
buildConfiguration: 'release'
See: https://learn.microsoft.com/en-us/azure/devops/pipelines/process/run-number?view=azure-devops&tabs=yaml