diff --git a/share/ruby-build/truffleruby-1.0.0-rc8 b/share/ruby-build/truffleruby-1.0.0-rc8
new file mode 100644
index 00000000..af3e5313
--- /dev/null
+++ b/share/ruby-build/truffleruby-1.0.0-rc8
@@ -0,0 +1,7 @@
+install_package "openssl-1.1.0i" "https://www.openssl.org/source/openssl-1.1.0i.tar.gz#ebbfc844a8c8cc0ea5dc10b86c9ce97f401837f3fa08c17b2cdadc118253cf99" mac_openssl --if has_broken_mac_openssl
+
+if is_mac; then
+  install_package "truffleruby-1.0.0-rc8" "https://github.com/oracle/truffleruby/releases/download/vm-1.0.0-rc8/truffleruby-1.0.0-rc8-macos-amd64.tar.gz#e627b43cdd5e8f1711704c6a2f5a1503957df7b226fd722771c54ea6c217457a" truffleruby
+else
+  install_package "truffleruby-1.0.0-rc8" "https://github.com/oracle/truffleruby/releases/download/vm-1.0.0-rc8/truffleruby-1.0.0-rc8-linux-amd64.tar.gz#080e066272184a72dc8019841ad0bca015cfa4ab979c6605c30346fcc0604597" truffleruby
+fi