From 6cc29ed377e294b3e7b61e3525985eb4f5c0a0e6 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 30 Oct 2020 07:15:11 +0900
Subject: Fix the condition to detect core mrbgems.

---
 lib/mruby/gem.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/mruby/gem.rb b/lib/mruby/gem.rb
index 46ef1901e..349423bb7 100644
--- a/lib/mruby/gem.rb
+++ b/lib/mruby/gem.rb
@@ -81,8 +81,8 @@ module MRuby
 
         @generate_functions = !(@rbfiles.empty? && @objs.empty?)
         @objs << objfile("#{build_dir}/gem_init") if @generate_functions
-        root = MRUBY_ROOT
-        if @dir[0,root.size] == root
+        mgem = MRUBY_ROOT+"/mrbgems"
+        if @dir[0,mgem.size] == mgem
           @cdump = true    # OK to cdump core mrbgems
         else
           @cdump = false   # use mrb dump by default
-- 
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