https://git.ruby-lang.org/ruby.git/commit/?id=0bb5525eb2

From 0bb5525eb2966b5821eb714c898b1c9c33221660 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 7 Aug 2022 17:01:22 +0900
Subject: Fix files for gemspec files direct-under lib

Collected `files` lacked `lib` prefix.
---
 tool/rbinstall.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index ab3193f9e0..ba0d911fc2 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -773,7 +773,7 @@ module RbInstall https://github.com/ruby/ruby/blob/trunk/tool/rbinstall.rb#L773
                     remove_prefix(prefix, ruby_source)
                   end
                 else
-                  [File.basename(@gemspec, '.gemspec') + '.rb']
+                  [@gemspec[%r[(?:[^/]+/)?[^/]+(?=\.gemspec\z)]] + '.rb']
                 end
 
         case File.basename(@gemspec, ".gemspec")
-- 
cgit v1.2.1


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