diff --git a/Library/Homebrew/extend/object.rbi b/Library/Homebrew/extend/object.rbi
new file mode 100644
index 0000000000..cc39405568
--- /dev/null
+++ b/Library/Homebrew/extend/object.rbi
@@ -0,0 +1,6 @@
+# typed: strict
+
+class Object
+  sig { returns(T::Boolean) }
+  def present?; end
+end
diff --git a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
index 65585d3cd0..cff64f5802 100644
--- a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
+++ b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
@@ -11,8 +11,6 @@ module UnpackStrategy
       include UnpackStrategy
       include SystemCommand::Mixin
 
-      using Magic
-
       sig { override.params(unpack_dir: Pathname, basename: Pathname, verbose: T::Boolean).returns(T.untyped) }
       def extract_to_dir(unpack_dir, basename:, verbose:)
         with_env(TZ: "UTC") do
diff --git a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rbi b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rbi
index ee40416382..43597431d9 100644
--- a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rbi
+++ b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rbi
@@ -1,9 +1,5 @@
 # typed: strict
 
-module UnpackStrategy
-  class Zip
-    module MacOSZipExtension
-      include Kernel
-    end
-  end
+module UnpackStrategy::Zip::MacOSZipExtension
+  include Kernel
 end
diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index 28bd016628..ca9144b27a 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -466,6 +466,32 @@ class Pathname
   def rpaths
     []
   end
+
+  sig { returns(String) }
+  def magic_number
+    @magic_number ||= if directory?
+      ""
+    else
+      # Length of the longest regex (currently Tar).
+      max_magic_number_length = 262
+      # FIXME: The `T.let` is a workaround until we have https://github.com/sorbet/sorbet/pull/6865
+      T.let(binread(max_magic_number_length), T.nilable(String)) || ""
+    end
+  end
+
+  sig { returns(String) }
+  def file_type
+    @file_type ||= system_command("file", args: ["-b", self], print_stderr: false)
+                   .stdout.chomp
+  end
+
+  sig { returns(T::Array[String]) }
+  def zipinfo
+    @zipinfo ||= system_command("zipinfo", args: ["-1", self], print_stderr: false)
+                 .stdout
+                 .encode(Encoding::UTF_8, invalid: :replace)
+                 .split("\n")
+  end
 end
 
 require "extend/os/pathname"
diff --git a/Library/Homebrew/unpack_strategy.rb b/Library/Homebrew/unpack_strategy.rb
index b7572d18e7..8a29604b93 100644
--- a/Library/Homebrew/unpack_strategy.rb
+++ b/Library/Homebrew/unpack_strategy.rb
@@ -1,29 +1,8 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "system_command"
 
-# Helper module for iterating over directory trees.
-#
-# @api private
-module PathnameEachDirectory
-  refine Pathname do
-    extend T::Sig
-
-    sig {
-      type_parameters(:T)
-        .params(
-          _block: T.proc.params(path: Pathname).returns(T.type_parameter(:T)),
-        ).returns(T.type_parameter(:T))
-    }
-    def each_directory(&_block)
-      find do |path|
-        yield path if path.directory?
-      end
-    end
-  end
-end
-
 # Module containing all available strategies for unpacking archives.
 #
 # @api private
@@ -33,38 +12,6 @@ module UnpackStrategy
 
   include SystemCommand::Mixin
 
-  using PathnameEachDirectory
-
-  # Helper module for identifying the file type.
-  module Magic
-    # Length of the longest regex (currently Tar).
-    MAX_MAGIC_NUMBER_LENGTH = 262
-    private_constant :MAX_MAGIC_NUMBER_LENGTH
-
-    refine Pathname do
-      def magic_number
-        @magic_number ||= if directory?
-          ""
-        else
-          binread(MAX_MAGIC_NUMBER_LENGTH) || ""
-        end
-      end
-
-      def file_type
-        @file_type ||= system_command("file", args: ["-b", self], print_stderr: false)
-                       .stdout.chomp
-      end
-
-      def zipinfo
-        @zipinfo ||= system_command("zipinfo", args: ["-1", self], print_stderr: false)
-                     .stdout
-                     .encode(Encoding::UTF_8, invalid: :replace)
-                     .split("\n")
-      end
-    end
-  end
-  private_constant :Magic
-
   def self.strategies
     @strategies ||= [
       Tar, # Needs to be before Bzip2/Gzip/Xz/Lzma/Zstd.
@@ -195,7 +142,7 @@ module UnpackStrategy
       end
 
       # Ensure all extracted directories are writable.
-      tmp_unpack_dir.each_directory do |path|
+      each_directory(tmp_unpack_dir) do |path|
         next if path.writable?
 
         FileUtils.chmod "u+w", path, verbose: verbose
@@ -208,6 +155,19 @@ module UnpackStrategy
   def dependencies
     []
   end
+
+  # Helper method for iterating over directory trees.
+  sig {
+    params(
+      pathname: Pathname,
+      _block:   T.proc.params(path: Pathname).void,
+    ).returns(T.nilable(Pathname))
+  }
+  def each_directory(pathname, &_block)
+    pathname.find do |path|
+      yield path if path.directory?
+    end
+  end
 end
 
 require "unpack_strategy/air"
diff --git a/Library/Homebrew/unpack_strategy.rbi b/Library/Homebrew/unpack_strategy.rbi
index 55284f6668..d7550c56b2 100644
--- a/Library/Homebrew/unpack_strategy.rbi
+++ b/Library/Homebrew/unpack_strategy.rbi
@@ -3,14 +3,3 @@
 module UnpackStrategy
   include Kernel
 end
-
-class Pathname
-  sig { returns(String) }
-  def magic_number; end
-
-  sig { returns(String) }
-  def file_type; end
-
-  sig { returns(T::Array[String]) }
-  def zipinfo; end
-end
diff --git a/Library/Homebrew/unpack_strategy/air.rb b/Library/Homebrew/unpack_strategy/air.rb
index 9f8bd8c473..aac0881fa8 100644
--- a/Library/Homebrew/unpack_strategy/air.rb
+++ b/Library/Homebrew/unpack_strategy/air.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".air"]
diff --git a/Library/Homebrew/unpack_strategy/bazaar.rb b/Library/Homebrew/unpack_strategy/bazaar.rb
index 12fbd503d0..62eb0c4946 100644
--- a/Library/Homebrew/unpack_strategy/bazaar.rb
+++ b/Library/Homebrew/unpack_strategy/bazaar.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Bazaar < Directory
     extend T::Sig
 
-    using Magic
-
     def self.can_extract?(path)
       super && (path/".bzr").directory?
     end
diff --git a/Library/Homebrew/unpack_strategy/bzip2.rb b/Library/Homebrew/unpack_strategy/bzip2.rb
index 6b05e4dc15..82e9501b6a 100644
--- a/Library/Homebrew/unpack_strategy/bzip2.rb
+++ b/Library/Homebrew/unpack_strategy/bzip2.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".bz2"]
diff --git a/Library/Homebrew/unpack_strategy/cab.rb b/Library/Homebrew/unpack_strategy/cab.rb
index 82265231d5..de2258af88 100644
--- a/Library/Homebrew/unpack_strategy/cab.rb
+++ b/Library/Homebrew/unpack_strategy/cab.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".cab"]
diff --git a/Library/Homebrew/unpack_strategy/compress.rb b/Library/Homebrew/unpack_strategy/compress.rb
index 65f9ea8728..0cc11abbd7 100644
--- a/Library/Homebrew/unpack_strategy/compress.rb
+++ b/Library/Homebrew/unpack_strategy/compress.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Compress < Tar
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".Z"]
diff --git a/Library/Homebrew/unpack_strategy/cvs.rb b/Library/Homebrew/unpack_strategy/cvs.rb
index 66c2f17f8f..af6f0a3a77 100644
--- a/Library/Homebrew/unpack_strategy/cvs.rb
+++ b/Library/Homebrew/unpack_strategy/cvs.rb
@@ -6,8 +6,6 @@ require_relative "directory"
 module UnpackStrategy
   # Strategy for unpacking CVS repositories.
   class Cvs < Directory
-    using Magic
-
     def self.can_extract?(path)
       super && (path/"CVS").directory?
     end
diff --git a/Library/Homebrew/unpack_strategy/directory.rb b/Library/Homebrew/unpack_strategy/directory.rb
index 02772dcc68..f20b9a566e 100644
--- a/Library/Homebrew/unpack_strategy/directory.rb
+++ b/Library/Homebrew/unpack_strategy/directory.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       []
diff --git a/Library/Homebrew/unpack_strategy/dmg.rb b/Library/Homebrew/unpack_strategy/dmg.rb
index 66c9f32fe7..cb3ee47d12 100644
--- a/Library/Homebrew/unpack_strategy/dmg.rb
+++ b/Library/Homebrew/unpack_strategy/dmg.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "tempfile"
@@ -12,6 +12,8 @@ module UnpackStrategy
 
     # Helper module for listing the contents of a volume mounted from a disk image.
     module Bom
+      extend T::Sig
+
       DMG_METADATA = Set.new(%w[
         .background
         .com.apple.timemachine.donotpresent
@@ -35,106 +37,100 @@ module UnpackStrategy
         end
       end
 
-      refine Pathname do
-        extend T::Sig
+      # Check if path is considered disk image metadata.
+      sig { params(pathname: Pathname).returns(T::Boolean) }
+      def self.dmg_metadata?(pathname)
+        DMG_METADATA.include?(pathname.cleanpath.ascend.to_a.last.to_s)
+      end
 
-        # Check if path is considered disk image metadata.
-        sig { returns(T::Boolean) }
-        def dmg_metadata?
-          DMG_METADATA.include?(cleanpath.ascend.to_a.last.to_s)
+      # Check if path is a symlink to a system directory (commonly to /Applications).
+      sig { params(pathname: Pathname).returns(T::Boolean) }
+      def self.system_dir_symlink?(pathname)
+        pathname.symlink? && MacOS.system_dir?(pathname.dirname.join(pathname.readlink))
+      end
+
+      sig { params(pathname: Pathname).returns(String) }
+      def self.bom(pathname)
+        tries = 0
+        result = loop do
+          # We need to use `find` here instead of Ruby in order to properly handle
+          # file names containing special characters, such as “e” + “´” vs. “é”.
+          r = system_command("find", args: [".", "-print0"], chdir: pathname, print_stderr: false)
+          tries += 1
+
+          # Spurious bug on CI, which in most cases can be worked around by retrying.
+          break r unless r.stderr.match?(/Interrupted system call/i)
+
+          raise "Command `#{r.command.shelljoin}` was interrupted." if tries >= 3
         end
 
-        # Check if path is a symlink to a system directory (commonly to /Applications).
-        sig { returns(T::Boolean) }
-        def system_dir_symlink?
-          symlink? && MacOS.system_dir?(dirname.join(readlink))
-        end
+        odebug "Command `#{result.command.shelljoin}` in '#{pathname}' took #{tries} tries." if tries > 1
 
-        sig { returns(String) }
-        def bom
-          tries = 0
-          result = loop do
-            # We need to use `find` here instead of Ruby in order to properly handle
-            # file names containing special characters, such as “e” + “´” vs. “é”.
-            r = system_command("find", args: [".", "-print0"], chdir: self, print_stderr: false)
-            tries += 1
+        bom_paths = result.stdout.split("\0")
 
-            # Spurious bug on CI, which in most cases can be worked around by retrying.
-            break r unless r.stderr.match?(/Interrupted system call/i)
+        raise EmptyError, pathname if bom_paths.empty?
 
-            raise "Command `#{r.command.shelljoin}` was interrupted." if tries >= 3
-          end
-
-          odebug "Command `#{result.command.shelljoin}` in '#{self}' took #{tries} tries." if tries > 1
-
-          bom_paths = result.stdout.split("\0")
-
-          raise EmptyError, self if bom_paths.empty?
-
-          bom_paths
-            .reject { |path| Pathname(path).dmg_metadata? }
-            .reject { |path| (self/path).system_dir_symlink? }
-            .join("\n")
-        end
+        bom_paths
+          .reject { |path| dmg_metadata?(Pathname(path)) }
+          .reject { |path| system_dir_symlink?(pathname/path) }
+          .join("\n")
       end
     end
-    private_constant :Bom
 
     # Strategy for unpacking a volume mounted from a disk image.
     class Mount
       extend T::Sig
 
-      using Bom
       include UnpackStrategy
 
       def eject(verbose: false)
-        tries ||= 3
+        tries = 3
+        begin
+          return unless path.exist?
 
-        return unless path.exist?
+          if tries > 1
+            disk_info = system_command!(
+              "diskutil",
+              args:         ["info", "-plist", path],
+              print_stderr: false,
+              verbose:      verbose,
+            )
 
-        if tries > 1
-          disk_info = system_command!(
-            "diskutil",
-            args:         ["info", "-plist", path],
-            print_stderr: false,
-            verbose:      verbose,
-          )
+            # For HFS, just use <mount-path>
+            # For APFS, find the <physical-store> corresponding to <mount-path>
+            eject_paths = disk_info.plist
+                                   .fetch("APFSPhysicalStores", [])
+                                   .map { |store| store["APFSPhysicalStore"] }
+                                   .compact
+                                   .presence || [path]
 
-          # For HFS, just use <mount-path>
-          # For APFS, find the <physical-store> corresponding to <mount-path>
-          eject_paths = disk_info.plist
-                                 .fetch("APFSPhysicalStores", [])
-                                 .map { |store| store["APFSPhysicalStore"] }
-                                 .compact
-                                 .presence || [path]
-
-          eject_paths.each do |eject_path|
+            eject_paths.each do |eject_path|
+              system_command! "diskutil",
+                              args:         ["eject", eject_path],
+                              print_stderr: false,
+                              verbose:      verbose
+            end
+          else
             system_command! "diskutil",
-                            args:         ["eject", eject_path],
+                            args:         ["unmount", "force", path],
                             print_stderr: false,
                             verbose:      verbose
           end
-        else
-          system_command! "diskutil",
-                          args:         ["unmount", "force", path],
-                          print_stderr: false,
-                          verbose:      verbose
-        end
-      rescue ErrorDuringExecution => e
-        raise e if (tries -= 1).zero?
+        rescue ErrorDuringExecution => e
+          raise e if (tries -= 1).zero?
 
-        sleep 1
-        retry
+          sleep 1
+          retry
+        end
       end
 
       private
 
       sig { override.params(unpack_dir: Pathname, basename: Pathname, verbose: T::Boolean).returns(T.untyped) }
       def extract_to_dir(unpack_dir, basename:, verbose:)
+        tries = 3
         bom = begin
-          tries ||= 3
-
-          path.bom
+          Bom.bom(path)
         rescue Bom::EmptyError => e
           raise e if (tries -= 1).zero?
 
diff --git a/Library/Homebrew/unpack_strategy/executable.rb b/Library/Homebrew/unpack_strategy/executable.rb
index 1daeb7d0f7..6bf45599ed 100644
--- a/Library/Homebrew/unpack_strategy/executable.rb
+++ b/Library/Homebrew/unpack_strategy/executable.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Executable < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".sh", ".bash"]
diff --git a/Library/Homebrew/unpack_strategy/fossil.rb b/Library/Homebrew/unpack_strategy/fossil.rb
index ddaf147795..a09218cf77 100644
--- a/Library/Homebrew/unpack_strategy/fossil.rb
+++ b/Library/Homebrew/unpack_strategy/fossil.rb
@@ -11,8 +11,6 @@ module UnpackStrategy
     include UnpackStrategy
     extend SystemCommand::Mixin
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       []
diff --git a/Library/Homebrew/unpack_strategy/generic_unar.rb b/Library/Homebrew/unpack_strategy/generic_unar.rb
index 0322d5c9ef..a860f8ec6b 100644
--- a/Library/Homebrew/unpack_strategy/generic_unar.rb
+++ b/Library/Homebrew/unpack_strategy/generic_unar.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       []
diff --git a/Library/Homebrew/unpack_strategy/git.rb b/Library/Homebrew/unpack_strategy/git.rb
index 23257c0502..ab39f3c4e0 100644
--- a/Library/Homebrew/unpack_strategy/git.rb
+++ b/Library/Homebrew/unpack_strategy/git.rb
@@ -6,8 +6,6 @@ require_relative "directory"
 module UnpackStrategy
   # Strategy for unpacking Git repositories.
   class Git < Directory
-    using Magic
-
     def self.can_extract?(path)
       super && (path/".git").directory?
     end
diff --git a/Library/Homebrew/unpack_strategy/gzip.rb b/Library/Homebrew/unpack_strategy/gzip.rb
index 983d995a98..dbc70d2766 100644
--- a/Library/Homebrew/unpack_strategy/gzip.rb
+++ b/Library/Homebrew/unpack_strategy/gzip.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".gz"]
diff --git a/Library/Homebrew/unpack_strategy/jar.rb b/Library/Homebrew/unpack_strategy/jar.rb
index d4170a8689..21153d1c2b 100644
--- a/Library/Homebrew/unpack_strategy/jar.rb
+++ b/Library/Homebrew/unpack_strategy/jar.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Jar < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".apk", ".jar"]
diff --git a/Library/Homebrew/unpack_strategy/lha.rb b/Library/Homebrew/unpack_strategy/lha.rb
index 543f4e4540..a8cdfdb4cf 100644
--- a/Library/Homebrew/unpack_strategy/lha.rb
+++ b/Library/Homebrew/unpack_strategy/lha.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".lha", ".lzh"]
diff --git a/Library/Homebrew/unpack_strategy/lua_rock.rb b/Library/Homebrew/unpack_strategy/lua_rock.rb
index 6150e2788e..d5ce7de33e 100644
--- a/Library/Homebrew/unpack_strategy/lua_rock.rb
+++ b/Library/Homebrew/unpack_strategy/lua_rock.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class LuaRock < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".rock"]
diff --git a/Library/Homebrew/unpack_strategy/lzip.rb b/Library/Homebrew/unpack_strategy/lzip.rb
index da8a991b9e..d1f2c432af 100644
--- a/Library/Homebrew/unpack_strategy/lzip.rb
+++ b/Library/Homebrew/unpack_strategy/lzip.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".lz"]
diff --git a/Library/Homebrew/unpack_strategy/lzma.rb b/Library/Homebrew/unpack_strategy/lzma.rb
index 7ef147b61b..bfe04be2c9 100644
--- a/Library/Homebrew/unpack_strategy/lzma.rb
+++ b/Library/Homebrew/unpack_strategy/lzma.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".lzma"]
diff --git a/Library/Homebrew/unpack_strategy/mercurial.rb b/Library/Homebrew/unpack_strategy/mercurial.rb
index cc27a11395..72d9547933 100644
--- a/Library/Homebrew/unpack_strategy/mercurial.rb
+++ b/Library/Homebrew/unpack_strategy/mercurial.rb
@@ -6,8 +6,6 @@ require_relative "directory"
 module UnpackStrategy
   # Strategy for unpacking Mercurial repositories.
   class Mercurial < Directory
-    using Magic
-
     def self.can_extract?(path)
       super && (path/".hg").directory?
     end
diff --git a/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb b/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
index 616d78bc06..ad3940d86e 100644
--- a/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
+++ b/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class MicrosoftOfficeXml < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [
diff --git a/Library/Homebrew/unpack_strategy/otf.rb b/Library/Homebrew/unpack_strategy/otf.rb
index e94eb15029..61ac40a249 100644
--- a/Library/Homebrew/unpack_strategy/otf.rb
+++ b/Library/Homebrew/unpack_strategy/otf.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Otf < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".otf"]
diff --git a/Library/Homebrew/unpack_strategy/p7zip.rb b/Library/Homebrew/unpack_strategy/p7zip.rb
index 618ea06f23..715c816076 100644
--- a/Library/Homebrew/unpack_strategy/p7zip.rb
+++ b/Library/Homebrew/unpack_strategy/p7zip.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".7z"]
diff --git a/Library/Homebrew/unpack_strategy/pax.rb b/Library/Homebrew/unpack_strategy/pax.rb
index 4067132c80..c454b57ab4 100644
--- a/Library/Homebrew/unpack_strategy/pax.rb
+++ b/Library/Homebrew/unpack_strategy/pax.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".pax"]
diff --git a/Library/Homebrew/unpack_strategy/pkg.rb b/Library/Homebrew/unpack_strategy/pkg.rb
index 220b86a58c..7151ba6078 100644
--- a/Library/Homebrew/unpack_strategy/pkg.rb
+++ b/Library/Homebrew/unpack_strategy/pkg.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Pkg < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".pkg", ".mkpg"]
diff --git a/Library/Homebrew/unpack_strategy/rar.rb b/Library/Homebrew/unpack_strategy/rar.rb
index bd2b8042bb..9a2be11326 100644
--- a/Library/Homebrew/unpack_strategy/rar.rb
+++ b/Library/Homebrew/unpack_strategy/rar.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".rar"]
diff --git a/Library/Homebrew/unpack_strategy/self_extracting_executable.rb b/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
index 0e99278711..a3ea1e8de1 100644
--- a/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
+++ b/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class SelfExtractingExecutable < GenericUnar
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       []
diff --git a/Library/Homebrew/unpack_strategy/sit.rb b/Library/Homebrew/unpack_strategy/sit.rb
index 687e7d0e64..d747cb3178 100644
--- a/Library/Homebrew/unpack_strategy/sit.rb
+++ b/Library/Homebrew/unpack_strategy/sit.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Sit < GenericUnar
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".sit"]
diff --git a/Library/Homebrew/unpack_strategy/subversion.rb b/Library/Homebrew/unpack_strategy/subversion.rb
index dd3355825b..4097f13610 100644
--- a/Library/Homebrew/unpack_strategy/subversion.rb
+++ b/Library/Homebrew/unpack_strategy/subversion.rb
@@ -6,8 +6,6 @@ require_relative "directory"
 module UnpackStrategy
   # Strategy for unpacking Subversion repositories.
   class Subversion < Directory
-    using Magic
-
     def self.can_extract?(path)
       super && (path/".svn").directory?
     end
diff --git a/Library/Homebrew/unpack_strategy/tar.rb b/Library/Homebrew/unpack_strategy/tar.rb
index 9b0797cfa1..42ca323d33 100644
--- a/Library/Homebrew/unpack_strategy/tar.rb
+++ b/Library/Homebrew/unpack_strategy/tar.rb
@@ -11,8 +11,6 @@ module UnpackStrategy
     include UnpackStrategy
     extend SystemCommand::Mixin
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [
diff --git a/Library/Homebrew/unpack_strategy/ttf.rb b/Library/Homebrew/unpack_strategy/ttf.rb
index 38b44879de..bd0da5ea76 100644
--- a/Library/Homebrew/unpack_strategy/ttf.rb
+++ b/Library/Homebrew/unpack_strategy/ttf.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
   class Ttf < Uncompressed
     extend T::Sig
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".ttc", ".ttf"]
diff --git a/Library/Homebrew/unpack_strategy/xar.rb b/Library/Homebrew/unpack_strategy/xar.rb
index ce35a0683a..4707a602d5 100644
--- a/Library/Homebrew/unpack_strategy/xar.rb
+++ b/Library/Homebrew/unpack_strategy/xar.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".xar"]
diff --git a/Library/Homebrew/unpack_strategy/xz.rb b/Library/Homebrew/unpack_strategy/xz.rb
index 61e1b2c3ab..cc450d51d6 100644
--- a/Library/Homebrew/unpack_strategy/xz.rb
+++ b/Library/Homebrew/unpack_strategy/xz.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".xz"]
diff --git a/Library/Homebrew/unpack_strategy/zip.rb b/Library/Homebrew/unpack_strategy/zip.rb
index c8925c96c6..85ef33cbbb 100644
--- a/Library/Homebrew/unpack_strategy/zip.rb
+++ b/Library/Homebrew/unpack_strategy/zip.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".zip"]
diff --git a/Library/Homebrew/unpack_strategy/zstd.rb b/Library/Homebrew/unpack_strategy/zstd.rb
index 4e77184977..c5f0b2a6b9 100644
--- a/Library/Homebrew/unpack_strategy/zstd.rb
+++ b/Library/Homebrew/unpack_strategy/zstd.rb
@@ -8,8 +8,6 @@ module UnpackStrategy
 
     include UnpackStrategy
 
-    using Magic
-
     sig { returns(T::Array[String]) }
     def self.extensions
       [".zst"]