DOC: Explain better how to build the docs

README_SETUP.md

@@ -80,13 +80,16 @@ See `build.properties.d/00_default.properties` for more information.
 
 ## Build the documentation #
 
-Build documentation in `build/` with `make doc`.
+Install the below requirements and build documentation in `build/`
+with `make doc`. You may need to set the environment variables used in
+`src/doc/Makefile`, especially `JSDOC_BIN` in case you didn't install
+jsdoc globally.
 
 ### Requirements ##
 
 - sphinx
 - sphinx-autoapi
 - jsdoc (`npm install jsdoc`)
-- jsdoc-sphinx  (`npm install jsdoc-sphinx`)
+- @indiscale/jsdoc-sphinx  (`npm install @indiscale/jsdoc-sphinx`)
 - sphinx-js
 - recommonmark