diff --git a/documentation/Makefile b/documentation/Makefile
--- a/documentation/Makefile
+++ b/documentation/Makefile
@@ -41,7 +41,7 @@
 GEMBASE?= 	${LOCALBASE}
 .endif
 
-RUBY_CMD =	${GEMBASE}/bin/ruby
+RUBY_CMD ?=	${LOCALBASE}/bin/ruby
 HUGO_CMD =	${LOCALBASE}/bin/hugo
 HUGO_ARGS?=	--minify
 HUGO_OFFLINE_ARGS?= 	--environment offline --verbose --minify
diff --git a/documentation/content/en/books/fdp-primer/overview/_index.adoc b/documentation/content/en/books/fdp-primer/overview/_index.adoc
--- a/documentation/content/en/books/fdp-primer/overview/_index.adoc
+++ b/documentation/content/en/books/fdp-primer/overview/_index.adoc
@@ -253,10 +253,6 @@
 
 [.procedure]
 ====
-[TIP]
-======
-Hugo version 0.90 or higher must be used
-======
 
 . Install these packages using link:https://brew.sh/[Homebrew] and link:https://rubygems.org/[RubyGem].
 +
@@ -274,6 +270,13 @@
 $ source ~/.zshrc
 ....
 +
+. Add git alias to Homebrew git since `git format-patch` from Apple-provided git won't work with Phabricator.
++
+[source,shell]
+....
+$ echo 'alias git=/usr/local/bin/git' >> ~/.zshrc
+$ source ~/.zshrc
+....
 . Install the rouge package using RubyGem.
 +
 [source,shell]
@@ -297,7 +300,7 @@
 +
 [source,shell]
 ....
-$ bmake run LOCALBASE=/opt/homebrew USE_RUBYGEMS=YES
+$ bmake run USE_RUBYGEMS=YES RUBY_CMD=$(brew --prefix ruby)/bin/ruby
 ....
 . Add all the files with `git add .`, then review the diff with `git diff`. For example:
 +