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[R-pkg-devel] Rcpp: cannot find R_ext/Callbacks.h under winbuilders R-devel

Dear package developers and affiliated people,

 

I just noted a problem with an Rcpp-based package (cannot find
R_ext/Callbacks.h):

 

https://win-builder.r-project.org/S0C6dP4J5NLU/00install.out

 

I admit that I don't know if it is a problem in Rcpp, R-devel or in the Rcpp
example from RStudio.

 

To reproduce in RStudio, just 

 

1.	create a new Rcpp sample, 
2.	change the email in DESCRIPTION into something meaningful (I forgot
that part when I tried it first)
3.	submit to r-devel (!) on CRAN's winbuilder

 

I appreciate any guidance on this (since my own package shows the same
error).

 

Best wishes,

 

Matthias