Error in mybinder.org: there is no package called ‘IRkernel’

Hello,
I managed to create a Binder and was able to launch it. However, now after some time I was trying to rebuild it and struggle with the following error. Does anyone have an idea? The IRkernel package is not coming from my specification.
.binder files: aquainfra-usecase-Daugava/.binder at containerize · AstraLabuce/aquainfra-usecase-Daugava · GitHub
Binder: Binder