Better instructions

clemenshug · Mar 3, 2021 · 321e774 · 321e774
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commit 321e774
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -107,13 +107,15 @@ On __MacOS__ libcurl is included with the system, so usually nothing extra is ne
 brew install curl
 ```
 
-You need to set the `PKG_CONFIG_PATH` environment variable to help R find the non-default curl, when building from source:
+You need to set the `PKG_CONFIG_PATH` environment variable to help R find the non-default curl, when building from source. Run this in a __clean R session__ which does not have the curl package loaded already:
 
 ```r
 Sys.setenv(PKG_CONFIG_PATH="/usr/local/opt/curl/lib/pkgconfig")
 install.packages("curl", type = "source")
 ```
 
+Afterwards confirm the version using `curl::curl_version()`.
+
 ## Development version
 
 Because `devtools` and `httr` depend on `curl`, installing with `install_github` does not work well. The easiest way to install the development version of `curl` is a clean R session: