diff --git a/Gemfile.lock b/Gemfile.lock
index 10e19c7922..dd6a98e7b2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,7 @@ GEM
     base64 (0.3.0)
     benchmark (0.4.0)
     benchmark-ips (2.14.0)
-    bigdecimal (3.1.9)
+    bigdecimal (3.2.2)
     concurrent-ruby (1.3.5)
     connection_pool (2.5.3)
     csv (3.3.4)
@@ -43,7 +43,7 @@ GEM
     erb (5.0.1)
     extconf_compile_commands_json (0.0.7)
     ffi (1.17.2)
-    ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
     fileutils (1.7.3)
     goodcheck (3.1.0)
       marcel (>= 1.0, < 2.0)
@@ -71,7 +71,7 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nkf (0.2.0)
-    nokogiri (1.18.8-arm64-darwin)
+    nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
     ostruct (0.6.1)
     parallel (1.27.0)
@@ -127,7 +127,7 @@ GEM
     rubocop-ast (1.44.1)
       parser (>= 3.3.7.2)
       prism (~> 1.4)
-    rubocop-on-rbs (1.7.0)
+    rubocop-on-rbs (1.8.0)
       lint_roller (~> 1.1)
       rbs (~> 3.5)
       rubocop (>= 1.72.1, < 2.0)
@@ -175,7 +175,9 @@ GEM
     zlib (3.2.1)
 
 PLATFORMS
+  arm64-darwin
   arm64-darwin-24
+  x86_64-linux
 
 DEPENDENCIES
   abbrev
diff --git a/lib/rbs/collection/sources/git.rb b/lib/rbs/collection/sources/git.rb
index f9d53cb037..e4277dea3d 100644
--- a/lib/rbs/collection/sources/git.rb
+++ b/lib/rbs/collection/sources/git.rb
@@ -3,6 +3,7 @@
 require 'digest/sha2'
 require 'open3'
 require 'find'
+require 'fileutils'
 
 module RBS
   module Collection