Esmvaltool: Problems running the example "recipe_r.yml"

[hb326]

I try to run the example recipe "recipe_r.yml" and get the following error message:

esmvaltool._task.DiagnosticError: Diagnostic script examples/diagnostic.r failed with return code 1.

The error message in the log file is the following:

Error in library(yaml) : there is no package called 'yaml'
Execution halted

I have updated the environment just before trying to run the example recipe, and I went through the pip install routine. Any idea what is going wrong?

[hb326]

Nevermind. I should read the manual...