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-rw-r--r--src/Makefile4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/Makefile b/src/Makefile
index 02b8d6cb8..7bc2820d6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -395,7 +395,9 @@ CClink = $(CC)
# RUBY
# Uncomment this when you want to include the Ruby interface.
-#CONF_OPT_RUBY = --enable-rubyinterp
+# Note: you need the development package (e.g., ruby1.9.1-dev on Ubuntu).
+# CONF_OPT_RUBY = --enable-rubyinterp
+# CONF_OPT_RUBY = --enable-rubyinterp --with-ruby-command=ruby1.9.1
# MZSCHEME
# Uncomment this when you want to include the MzScheme interface.