Can't install pre-built without Rtools

[jcolgin-usgs]

Hello, I am attempting to install pak per the documentation for pre-built binaries (bold added for emphasis):

Our pre-built binaries have the advantage that they are completely self-contained and dependency free. No additional R packages, system libraries or tools (e.g. compilers) are needed for them. Install a pre-built binary build of pak from our repository on GitHub:

install.packages("pak", repos = sprintf( "https://r-lib.github.io/p/pak/stable/%s/%s/%s", .Platform$pkgType, R.Version()$os, R.Version()$arch))

Pak downloads but fails to install. Here are the warnings:

WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/

Warning: unable to access index for repository https://r-lib.github.io/p/pak/stable/win.binary/mingw32/x86_64/src/contrib:
cannot open URL 'https://r-lib.github.io/p/pak/stable/win.binary/mingw32/x86_64/src/contrib/PACKAGES'
Warning: unable to access index for repository https://r-lib.github.io/p/pak/stable/win.binary/mingw32/x86_64/bin/windows/contrib/4.5:
cannot open URL 'https://r-lib.github.io/p/pak/stable/win.binary/mingw32/x86_64/bin/windows/contrib/4.5/PACKAGES'
Warning message:
package ‘pak’ is not available for this version of R

A version of this package for your version of R might be available elsewhere,
see the ideas at
https://cran.r-project.org/doc/manuals/r-patched/R-admin.html#Installing-packages

That warning sounds a bit counter-intuitive, or I'm not fully understanding the nature of pre-builts and pak. I do not have Rtools installed. My R version is 4.5.3. Thanks in advance for the help.

[jcolgin-usgs]

Even stranger: running install.packages("pak") for the released version on CRAN will install pak. It gave the warning that Rtools was needed, but, install was a success. This is also seemingly contrary to documentation here https://pak.r-lib.org/index.html#install-from-cran (and here https://pak.r-lib.org/reference/install.html#install-from-cran)

Edit: are these warnings because I do indeed have the release version of R? For more context: I also have a custom date save for CRAN with my repos option in my .Rprofile, but I didn't think that would affect specifying the repos to the github.io page during install.packages(...)