You have file 'datapack/man/datapack.Rd' with \docType{package}, likely
intended as a package overview help file, but without the appropriate
PKGNAME-package \alias as per "Documenting packages" in R-exts.
This seems to be the consequence of the breaking change
Using @docType package no longer automatically adds a -package alias.
Instead document _PACKAGE to get all the defaults for package
documentation.
As explained in the issue, to get the desired PKGNAME-package \alias
back, you should either change to the new approach and document the new
special sentinel
"_PACKAGE"
or manually add
@aliases datapack-package
if remaining with the old approach.
Please fix in your master sources as appropriate, and submit a fixed
version of your package within the next few months.
From CRAN: