diff --git a/Library/Homebrew/dev-cmd/bottle.rb b/Library/Homebrew/dev-cmd/bottle.rb
index 19c00fd885..ea763127d5 100644
--- a/Library/Homebrew/dev-cmd/bottle.rb
+++ b/Library/Homebrew/dev-cmd/bottle.rb
@@ -32,7 +32,7 @@ EOS
 MAXIMUM_STRING_MATCHES = 100
 
 ALLOWABLE_HOMEBREW_REPOSITORY_LINKS = [
-  %r{#{HOMEBREW_LIBRARY}/Homebrew/os/(mac|linux)/pkgconfig},
+  %r{#{Regexp.escape(HOMEBREW_LIBRARY)}/Homebrew/os/(mac|linux)/pkgconfig},
 ].freeze
 
 module Homebrew
diff --git a/Library/Homebrew/extend/os/mac/keg_relocate.rb b/Library/Homebrew/extend/os/mac/keg_relocate.rb
index 1993dcccf0..51ac170287 100644
--- a/Library/Homebrew/extend/os/mac/keg_relocate.rb
+++ b/Library/Homebrew/extend/os/mac/keg_relocate.rb
@@ -131,10 +131,9 @@ class Keg
     old_prefix, new_prefix = relocation.replacement_pair_for(:prefix)
     old_cellar, new_cellar = relocation.replacement_pair_for(:cellar)
 
-    case old_name
-    when /^#{old_cellar}/
+    if old_name.start_with? old_cellar
       old_name.sub(old_cellar, new_cellar)
-    when /^#{old_prefix}/
+    elsif old_name.start_with? old_prefix
       old_name.sub(old_prefix, new_prefix)
     end
   end
diff --git a/Library/Homebrew/keg_relocate.rb b/Library/Homebrew/keg_relocate.rb
index 5c85626844..324b6ffb31 100644
--- a/Library/Homebrew/keg_relocate.rb
+++ b/Library/Homebrew/keg_relocate.rb
@@ -24,7 +24,7 @@ class Keg
 
     sig { params(key: Symbol, old_value: T.any(String, Regexp), new_value: String, path: T::Boolean).void }
     def add_replacement_pair(key, old_value, new_value, path: false)
-      old_value = self.class.path_regex(old_value) if path
+      old_value = self.class.path_to_regex(old_value) if path
       @replacement_map[key] = [old_value, new_value]
     end
 
@@ -49,15 +49,15 @@ class Keg
       any_changed
     end
 
-    sig { params(value: T.any(String, Regexp)).returns(Regexp) }
-    def self.path_regex(value)
-      value = case value
+    sig { params(path: T.any(String, Regexp)).returns(Regexp) }
+    def self.path_to_regex(path)
+      path = case path
       when String
-        Regexp.escape(value)
+        Regexp.escape(path)
       when Regexp
-        value.source
+        path.source
       end
-      Regexp.new(RELOCATABLE_PATH_REGEX_PREFIX.source + value)
+      Regexp.new(RELOCATABLE_PATH_REGEX_PREFIX.source + path)
     end
   end
 
@@ -244,7 +244,7 @@ class Keg
 
   def self.text_matches_in_file(file, string, ignores, linked_libraries, formula_and_runtime_deps_names)
     text_matches = []
-    path_regex = Relocation.path_regex(string)
+    path_regex = Relocation.path_to_regex(string)
     Utils.popen_read("strings", "-t", "x", "-", file.to_s) do |io|
       until io.eof?
         str = io.readline.chomp
diff --git a/Library/Homebrew/test/keg_relocate/relocation_spec.rb b/Library/Homebrew/test/keg_relocate/relocation_spec.rb
index ff0838c907..c4e0e43a69 100644
--- a/Library/Homebrew/test/keg_relocate/relocation_spec.rb
+++ b/Library/Homebrew/test/keg_relocate/relocation_spec.rb
@@ -59,10 +59,10 @@ describe Keg::Relocation do
     REPLACED
   end
 
-  specify "::path_regex" do
-    expect(described_class.path_regex(prefix)).to eq escaped_prefix
-    expect(described_class.path_regex("foo.bar")).to eq(/(?<![a-zA-Z0-9])foo\.bar/)
-    expect(described_class.path_regex(/#{cellar}/o)).to eq escaped_cellar
-    expect(described_class.path_regex(/foo.bar/)).to eq(/(?<![a-zA-Z0-9])foo.bar/)
+  specify "::path_to_regex" do
+    expect(described_class.path_to_regex(prefix)).to eq escaped_prefix
+    expect(described_class.path_to_regex("foo.bar")).to eq(/(?<![a-zA-Z0-9])foo\.bar/)
+    expect(described_class.path_to_regex(/#{cellar}/o)).to eq escaped_cellar
+    expect(described_class.path_to_regex(/foo.bar/)).to eq(/(?<![a-zA-Z0-9])foo.bar/)
   end
 end