From 7cfbcc3599e85f8489c558247ba59dc90a680db3 Mon Sep 17 00:00:00 2001
From: buty4649 <buty4649@gmail.com>
Date: Fri, 1 Aug 2025 14:06:19 +0900
Subject: [PATCH] fix: skip local build_config.rb when working in MRUBY_ROOT

Only use local build_config.rb when current directory != MRUBY_ROOT.
---
 lib/mruby/build.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/mruby/build.rb b/lib/mruby/build.rb
index 9cd36aae6..118660be0 100644
--- a/lib/mruby/build.rb
+++ b/lib/mruby/build.rb
@@ -60,7 +60,11 @@ module MRuby
       def mruby_config_path
         path = ENV['MRUBY_CONFIG'] || ENV['CONFIG']
         if path.nil? || path.empty?
-          path = File.file?("./build_config.rb") ? "./build_config.rb" : "#{MRUBY_ROOT}/build_config/default.rb"
+          if Dir.pwd != MRUBY_ROOT && File.file?("./build_config.rb")
+            path = "./build_config.rb"
+          else
+            path = "#{MRUBY_ROOT}/build_config/default.rb"
+          end
         elsif !File.file?(path) && !Pathname.new(path).absolute?
           f = "#{MRUBY_ROOT}/build_config/#{path}.rb"
           path = File.exist?(f) ? f : File.extname(path).empty? ? f : path