jonkeane commented on a change in pull request #11901:
URL: https://github.com/apache/arrow/pull/11901#discussion_r765087769



##########
File path: r/tools/nixlibs.R
##########
@@ -600,12 +600,15 @@ if (!file.exists(paste0(dst_dir, 
"/include/arrow/api.h"))) {
     # (2) Find source and build it
     src_dir <- find_local_source()
     if (!is.null(src_dir)) {
-      cat("*** Building C++ libraries\n")
+      cat("*** Building libarrow\n")
+      cat("*** For a faster installation, set the environment variable 
LIBARROW_BINARY=true before installing\n")
+      cat("*** Not all features are enabled by default.")
+      cat("    For a fully-featured installation, set the environment variable 
LIBARROW_MINIMAL=false before installing\n")

Review comment:
       Do we instead want to offer `NOT_CRAN=true` for both of these (and 
possibly collapse it down to "for a fester, more complete installation, set the 
environment variable NOT_CRAN=TRUE before installing")? 




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