diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index a14556da3c..9ea88cae70 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -357,7 +357,8 @@ end
 class NoUnzipCurlDownloadStrategy < CurlDownloadStrategy
   def stage
     UnpackStrategy::Uncompressed.new(cached_location)
-                                .extract(basename: basename_without_params)
+                                .extract(basename: basename_without_params,
+                                         verbose: ARGV.verbose? && !shutup)
   end
 end
 
diff --git a/Library/Homebrew/system_command.rb b/Library/Homebrew/system_command.rb
index 4f010217de..afa721547f 100644
--- a/Library/Homebrew/system_command.rb
+++ b/Library/Homebrew/system_command.rb
@@ -28,8 +28,9 @@ class SystemCommand
   end
 
   def run!
+    puts command.shelljoin.gsub(/\\=/, "=") if verbose? || ARGV.debug?
+
     @merged_output = []
-    odebug command.shelljoin
 
     each_output_line do |type, line|
       case type
@@ -46,13 +47,16 @@ class SystemCommand
     result
   end
 
-  def initialize(executable, args: [], sudo: false, input: [], print_stdout: false, print_stderr: true, must_succeed: false, env: {}, **options)
+  def initialize(executable, args: [], sudo: false, env: {}, input: [], must_succeed: false,
+                 print_stdout: false, print_stderr: true, verbose: false, **options)
+
     @executable = executable
     @args = args
     @sudo = sudo
     @input = [*input]
     @print_stdout = print_stdout
     @print_stderr = print_stderr
+    @verbose = verbose
     @must_succeed = must_succeed
     options.assert_valid_keys!(:chdir)
     @options = options
@@ -71,7 +75,7 @@ class SystemCommand
 
   attr_reader :executable, :args, :input, :options, :env
 
-  attr_predicate :sudo?, :print_stdout?, :print_stderr?, :must_succeed?
+  attr_predicate :sudo?, :print_stdout?, :print_stderr?, :verbose?, :must_succeed?
 
   def env_args
     set_variables = env.reject { |_, value| value.nil? }
diff --git a/Library/Homebrew/unpack_strategy/air.rb b/Library/Homebrew/unpack_strategy/air.rb
index 1b12e221b0..7ef51b4b95 100644
--- a/Library/Homebrew/unpack_strategy/air.rb
+++ b/Library/Homebrew/unpack_strategy/air.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module UnpackStrategy
   class Air
     include UnpackStrategy
@@ -17,13 +19,17 @@ module UnpackStrategy
       @dependencies ||= [Hbc::CaskLoader.load("adobe-air")]
     end
 
+    AIR_APPLICATION_INSTALLER =
+      "/Applications/Utilities/Adobe AIR Application Installer.app/Contents/MacOS/Adobe AIR Application Installer"
+
+    private_constant :AIR_APPLICATION_INSTALLER
+
     private
 
     def extract_to_dir(unpack_dir, basename:, verbose:)
-      system_command!(
-        "/Applications/Utilities/Adobe AIR Application Installer.app/Contents/MacOS/Adobe AIR Application Installer",
-        args: ["-silent", "-location", unpack_dir, path],
-      )
+      system_command! AIR_APPLICATION_INSTALLER,
+                      args: ["-silent", "-location", unpack_dir, path],
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/bzip2.rb b/Library/Homebrew/unpack_strategy/bzip2.rb
index e47cc062df..12ce68ad49 100644
--- a/Library/Homebrew/unpack_strategy/bzip2.rb
+++ b/Library/Homebrew/unpack_strategy/bzip2.rb
@@ -17,7 +17,9 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       FileUtils.cp path, unpack_dir/basename, preserve: true
       quiet_flags = verbose ? [] : ["-q"]
-      system_command! "bunzip2", args: [*quiet_flags, unpack_dir/basename]
+      system_command! "bunzip2",
+                      args: [*quiet_flags, unpack_dir/basename],
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/cab.rb b/Library/Homebrew/unpack_strategy/cab.rb
index afbf9e3784..dcbe0e6113 100644
--- a/Library/Homebrew/unpack_strategy/cab.rb
+++ b/Library/Homebrew/unpack_strategy/cab.rb
@@ -15,7 +15,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "cabextract",
                       args: ["-d", unpack_dir, "--", path],
-                      env: { "PATH" => PATH.new(Formula["cabextract"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["cabextract"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
 
     def dependencies
diff --git a/Library/Homebrew/unpack_strategy/dmg.rb b/Library/Homebrew/unpack_strategy/dmg.rb
index b15ec3c44d..55730bc02b 100644
--- a/Library/Homebrew/unpack_strategy/dmg.rb
+++ b/Library/Homebrew/unpack_strategy/dmg.rb
@@ -4,8 +4,6 @@ module UnpackStrategy
   class Dmg
     include UnpackStrategy
 
-    using Magic
-
     module Bom
       DMG_METADATA = Set.new %w[
         .background
@@ -51,7 +49,7 @@ module UnpackStrategy
     class Mount
       include UnpackStrategy
 
-      def eject
+      def eject(verbose: false)
         tries ||= 3
 
         return unless path.exist?
@@ -59,11 +57,13 @@ module UnpackStrategy
         if tries > 1
           system_command! "diskutil",
                           args: ["eject", path],
-                          print_stderr: false
+                          print_stderr: false,
+                          verbose: verbose
         else
           system_command! "diskutil",
                           args: ["unmount", "force", path],
-                          print_stderr: false
+                          print_stderr: false,
+                          verbose: verbose
         end
       rescue ErrorDuringExecution => e
         raise e if (tries -= 1).zero?
@@ -81,10 +81,14 @@ module UnpackStrategy
             filelist.puts(path.bom)
             filelist.close
 
-            system_command! "mkbom", args: ["-s", "-i", filelist.path, "--", bomfile.path]
+            system_command! "mkbom",
+                            args: ["-s", "-i", filelist.path, "--", bomfile.path],
+                            verbose: verbose
           end
 
-          system_command! "ditto", args: ["--bom", bomfile.path, "--", path, unpack_dir]
+          system_command! "ditto",
+                          args: ["--bom", bomfile.path, "--", path, unpack_dir],
+                          verbose: verbose
 
           FileUtils.chmod "u+w", Pathname.glob(unpack_dir/"**/*").reject(&:symlink?)
         end
@@ -111,7 +115,7 @@ module UnpackStrategy
         raise "No mounts found in '#{path}'; perhaps it is a bad disk image?" if mounts.empty?
 
         mounts.each do |mount|
-          mount.extract(to: unpack_dir)
+          mount.extract(to: unpack_dir, verbose: verbose)
         end
       end
     end
@@ -120,10 +124,11 @@ module UnpackStrategy
       Dir.mktmpdir do |mount_dir|
         mount_dir = Pathname(mount_dir)
 
-        without_eula = system_command("hdiutil",
+        without_eula = system_command "hdiutil",
                                       args: ["attach", "-plist", "-nobrowse", "-readonly", "-noidme", "-mountrandom", mount_dir, path],
                                       input: "qn\n",
-                                      print_stderr: false)
+                                      print_stderr: false,
+                                      verbose: verbose
 
         # If mounting without agreeing to EULA succeeded, there is none.
         plist = if without_eula.success?
@@ -131,12 +136,13 @@ module UnpackStrategy
         else
           cdr_path = mount_dir/path.basename.sub_ext(".cdr")
 
-          system_command!("hdiutil", args: ["convert", "-quiet", "-format", "UDTO", "-o", cdr_path, path])
+          system_command! "hdiutil",
+                          args: ["convert", "-quiet", "-format", "UDTO", "-o", cdr_path, path],
+                          verbose: verbose
 
-          with_eula = system_command!(
-            "/usr/bin/hdiutil",
-            args: ["attach", "-plist", "-nobrowse", "-readonly", "-noidme", "-mountrandom", mount_dir, cdr_path],
-          )
+          with_eula = system_command! "hdiutil",
+                                      args: ["attach", "-plist", "-nobrowse", "-readonly", "-noidme", "-mountrandom", mount_dir, cdr_path],
+                                      verbose: verbose
 
           if verbose && !(eula_text = without_eula.stdout).empty?
             ohai "Software License Agreement for '#{path}':"
@@ -158,7 +164,9 @@ module UnpackStrategy
         begin
           yield mounts
         ensure
-          mounts.each(&:eject)
+          mounts.each do |mount|
+            mount.eject(verbose: verbose)
+          end
         end
       end
     end
diff --git a/Library/Homebrew/unpack_strategy/fossil.rb b/Library/Homebrew/unpack_strategy/fossil.rb
index 5bc5e5e78f..846219e137 100644
--- a/Library/Homebrew/unpack_strategy/fossil.rb
+++ b/Library/Homebrew/unpack_strategy/fossil.rb
@@ -28,7 +28,8 @@ module UnpackStrategy
       system_command! "fossil",
                       args: ["open", path, *args],
                       chdir: unpack_dir,
-                      env: { "PATH" => PATH.new(Formula["fossil"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["fossil"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/generic_unar.rb b/Library/Homebrew/unpack_strategy/generic_unar.rb
index f9e65b9dec..6a1403b533 100644
--- a/Library/Homebrew/unpack_strategy/generic_unar.rb
+++ b/Library/Homebrew/unpack_strategy/generic_unar.rb
@@ -21,7 +21,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "unar",
                       args: ["-force-overwrite", "-quiet", "-no-directory", "-output-directory", unpack_dir, "--", path],
-                      env: { "PATH" => PATH.new(Formula["unar"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["unar"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/gzip.rb b/Library/Homebrew/unpack_strategy/gzip.rb
index d575721d74..2ea64b9ba9 100644
--- a/Library/Homebrew/unpack_strategy/gzip.rb
+++ b/Library/Homebrew/unpack_strategy/gzip.rb
@@ -18,7 +18,8 @@ module UnpackStrategy
       FileUtils.cp path, unpack_dir/basename, preserve: true
       quiet_flags = verbose ? [] : ["-q"]
       system_command! "gunzip",
-                      args: [*quiet_flags, "-N", "--", unpack_dir/basename]
+                      args: [*quiet_flags, "-N", "--", unpack_dir/basename],
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/lha.rb b/Library/Homebrew/unpack_strategy/lha.rb
index b3671b0a60..1e69bad8ea 100644
--- a/Library/Homebrew/unpack_strategy/lha.rb
+++ b/Library/Homebrew/unpack_strategy/lha.rb
@@ -21,7 +21,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "lha",
                       args: ["xq2w=#{unpack_dir}", path],
-                      env: { "PATH" => PATH.new(Formula["lha"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["lha"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/lzip.rb b/Library/Homebrew/unpack_strategy/lzip.rb
index f96e0ab2da..c18079f77f 100644
--- a/Library/Homebrew/unpack_strategy/lzip.rb
+++ b/Library/Homebrew/unpack_strategy/lzip.rb
@@ -23,7 +23,8 @@ module UnpackStrategy
       quiet_flags = verbose ? [] : ["-q"]
       system_command! "lzip",
                       args: ["-d", *quiet_flags, unpack_dir/basename],
-                      env: { "PATH" => PATH.new(Formula["lzip"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["lzip"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/lzma.rb b/Library/Homebrew/unpack_strategy/lzma.rb
index a9a60a0b9a..961731c6bd 100644
--- a/Library/Homebrew/unpack_strategy/lzma.rb
+++ b/Library/Homebrew/unpack_strategy/lzma.rb
@@ -17,7 +17,8 @@ module UnpackStrategy
       quiet_flags = verbose ? [] : ["-q"]
       system_command! "unlzma",
                       args: [*quiet_flags, "--", unpack_dir/basename],
-                      env: { "PATH" => PATH.new(Formula["xz"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["xz"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
 
     def dependencies
diff --git a/Library/Homebrew/unpack_strategy/mercurial.rb b/Library/Homebrew/unpack_strategy/mercurial.rb
index 34e897857c..15ca078930 100644
--- a/Library/Homebrew/unpack_strategy/mercurial.rb
+++ b/Library/Homebrew/unpack_strategy/mercurial.rb
@@ -13,7 +13,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "hg",
                       args: ["--cwd", path, "archive", "--subrepos", "-y", "-t", "files", unpack_dir],
-                      env: { "PATH" => PATH.new(Formula["mercurial"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["mercurial"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/p7zip.rb b/Library/Homebrew/unpack_strategy/p7zip.rb
index cfb76d08c9..d5fd3a181f 100644
--- a/Library/Homebrew/unpack_strategy/p7zip.rb
+++ b/Library/Homebrew/unpack_strategy/p7zip.rb
@@ -21,7 +21,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "7zr",
                       args: ["x", "-y", "-bd", "-bso0", path, "-o#{unpack_dir}"],
-                      env: { "PATH" => PATH.new(Formula["p7zip"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["p7zip"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/rar.rb b/Library/Homebrew/unpack_strategy/rar.rb
index 648c79e972..c8fa5df29e 100644
--- a/Library/Homebrew/unpack_strategy/rar.rb
+++ b/Library/Homebrew/unpack_strategy/rar.rb
@@ -21,7 +21,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "unrar",
                       args: ["x", "-inul", path, unpack_dir],
-                      env: { "PATH" => PATH.new(Formula["unrar"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["unrar"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/subversion.rb b/Library/Homebrew/unpack_strategy/subversion.rb
index 3824dce378..4c215e2672 100644
--- a/Library/Homebrew/unpack_strategy/subversion.rb
+++ b/Library/Homebrew/unpack_strategy/subversion.rb
@@ -13,7 +13,8 @@ module UnpackStrategy
     def extract_to_dir(unpack_dir, basename:, verbose:)
       system_command! "svn",
                       args: ["export", "--force", ".", unpack_dir],
-                      chdir: path.to_s
+                      chdir: path.to_s,
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/tar.rb b/Library/Homebrew/unpack_strategy/tar.rb
index a21682050d..d4b63a7d4f 100644
--- a/Library/Homebrew/unpack_strategy/tar.rb
+++ b/Library/Homebrew/unpack_strategy/tar.rb
@@ -35,11 +35,13 @@ module UnpackStrategy
 
         if DependencyCollector.tar_needs_xz_dependency? && Xz.can_extract?(path)
           tmpdir = Pathname(tmpdir)
-          Xz.new(path).extract(to: tmpdir)
+          Xz.new(path).extract(to: tmpdir, verbose: verbose)
           tar_path = tmpdir.children.first
         end
 
-        system_command! "tar", args: ["xf", tar_path, "-C", unpack_dir]
+        system_command! "tar",
+                        args: ["xf", tar_path, "-C", unpack_dir],
+                        verbose: verbose
       end
     end
   end
diff --git a/Library/Homebrew/unpack_strategy/xar.rb b/Library/Homebrew/unpack_strategy/xar.rb
index 043c6a5f49..0ebb198bfe 100644
--- a/Library/Homebrew/unpack_strategy/xar.rb
+++ b/Library/Homebrew/unpack_strategy/xar.rb
@@ -15,7 +15,9 @@ module UnpackStrategy
     private
 
     def extract_to_dir(unpack_dir, basename:, verbose:)
-      system_command! "xar", args: ["-x", "-f", path, "-C", unpack_dir]
+      system_command! "xar",
+                      args: ["-x", "-f", path, "-C", unpack_dir],
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/xz.rb b/Library/Homebrew/unpack_strategy/xz.rb
index 99673e6159..0f980a4887 100644
--- a/Library/Homebrew/unpack_strategy/xz.rb
+++ b/Library/Homebrew/unpack_strategy/xz.rb
@@ -23,7 +23,8 @@ module UnpackStrategy
       quiet_flags = verbose ? [] : ["-q"]
       system_command! "unxz",
                       args: [*quiet_flags, "-T0", "--", unpack_dir/basename],
-                      env: { "PATH" => PATH.new(Formula["xz"].opt_bin, ENV["PATH"]) }
+                      env: { "PATH" => PATH.new(Formula["xz"].opt_bin, ENV["PATH"]) },
+                      verbose: verbose
     end
   end
 end
diff --git a/Library/Homebrew/unpack_strategy/zip.rb b/Library/Homebrew/unpack_strategy/zip.rb
index ade45f6302..53abf291cd 100644
--- a/Library/Homebrew/unpack_strategy/zip.rb
+++ b/Library/Homebrew/unpack_strategy/zip.rb
@@ -16,7 +16,9 @@ module UnpackStrategy
 
     def extract_to_dir(unpack_dir, basename:, verbose:)
       quiet_flags = verbose ? [] : ["-qq"]
-      system_command! "unzip", args: [*quiet_flags, path, "-d", unpack_dir]
+      system_command! "unzip",
+                      args: [*quiet_flags, path, "-d", unpack_dir],
+                      verbose: verbose
     end
   end
 end