diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fc62da18..7ed5d5d07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,24 @@
 ## [Unreleased]
 
 
+## [v306] - 2025-05-08
+
+- JRuby 9.4.12.0, 9.4.12.1, 10.0.0.0, and 10.0.0.1 is now available
+
+
+## [v305] - 2025-04-28
+
+- Fix `cp --update=none` warning `heroku-22` (https://github.com/heroku/heroku-buildpack-ruby/pull/1588)
+
+## [v304] - 2025-04-28
+
+- Fix `cp --update=none` on `heroku-20` (https://github.com/heroku/heroku-buildpack-ruby/pull/1586)
+
+## [v303] - 2025-04-25
+
+- Ruby 3.5.0-preview1 is now available
+- Fix warning message about `cp -n` (https://github.com/heroku/heroku-buildpack-ruby/pull/1583)
+
 ## [v302] - 2025-04-16
 
 - Ruby 3.3.8 is now available
@@ -1675,7 +1693,11 @@ Bugfixes:
 * Change gem detection to use lockfile parser
 * use `$RACK_ENV` when thin is detected for rack apps
 
-[unreleased]: https://github.com/heroku/heroku-buildpack-ruby/compare/v302...main
+[unreleased]: https://github.com/heroku/heroku-buildpack-ruby/compare/v306...main
+[v306]: https://github.com/heroku/heroku-buildpack-ruby/compare/v305...v306
+[v305]: https://github.com/heroku/heroku-buildpack-ruby/compare/v304...v305
+[v304]: https://github.com/heroku/heroku-buildpack-ruby/compare/v303...v304
+[v303]: https://github.com/heroku/heroku-buildpack-ruby/compare/v302...v303
 [v302]: https://github.com/heroku/heroku-buildpack-ruby/compare/v301...v302
 [v301]: https://github.com/heroku/heroku-buildpack-ruby/compare/v300...v301
 [v300]: https://github.com/heroku/heroku-buildpack-ruby/compare/v299...v300
diff --git a/lib/language_pack/cache.rb b/lib/language_pack/cache.rb
index 6fa8bc58b..a1aec94d2 100644
--- a/lib/language_pack/cache.rb
+++ b/lib/language_pack/cache.rb
@@ -58,7 +58,13 @@ def load_without_overwrite(path, dest=nil)
     return unless @cache_base
 
     dest ||= path
-    copy (@cache_base + path), dest, '-a -n'
+
+    case ENV["STACK"]
+    when "heroku-20", "heroku-22", "scalingo-20", "scalingo-22"
+      copy (@cache_base + path), dest, "-a -n"
+    else
+      copy (@cache_base + path), dest, "-a --update=none"
+    end
   end
 
   # copy cache contents
@@ -70,7 +76,9 @@ def copy(from, to, options='-a')
     return false unless File.exist?(from)
     return true if File.expand_path(from) == File.expand_path(to) # see story 80029582
     FileUtils.mkdir_p File.dirname(to)
-    system("cp #{options} #{from}/. #{to}")
+    command = "cp #{options} #{from}/. #{to}"
+    system(command)
+    raise "Command failed `#{command}`" unless $?
   end
 
   # copy contents between to places in the cache
diff --git a/lib/language_pack/version.rb b/lib/language_pack/version.rb
index 3a72e8cf3..0a4a4fc47 100644
--- a/lib/language_pack/version.rb
+++ b/lib/language_pack/version.rb
@@ -2,6 +2,6 @@
 
 module LanguagePack
   class LanguagePack::Base
-    BUILDPACK_VERSION = "v302"
+    BUILDPACK_VERSION = "v306"
   end
 end