diff --git a/Library/Homebrew/cask/lib/hbc/artifact/installer.rb b/Library/Homebrew/cask/lib/hbc/artifact/installer.rb
index 8fa54c01ec..02fe349d11 100644
--- a/Library/Homebrew/cask/lib/hbc/artifact/installer.rb
+++ b/Library/Homebrew/cask/lib/hbc/artifact/installer.rb
@@ -23,7 +23,7 @@ module Hbc
         def install_phase(command: nil, **_)
           ohai "Running #{self.class.dsl_key} script '#{path.relative_path_from(cask.staged_path)}'"
           FileUtils.chmod "+x", path unless path.executable?
-          command.run(path, **args, path: PATH.new(HOMEBREW_PREFIX/"bin", HOMEBREW_PREFIX/"sbin", ENV["PATH"]))
+          command.run(path, **args, env: { "PATH" => PATH.new(HOMEBREW_PREFIX/"bin", HOMEBREW_PREFIX/"sbin", ENV["PATH"]) })
         end
       end
 
diff --git a/Library/Homebrew/cask/lib/hbc/utils/hash_validator.rb b/Library/Homebrew/cask/lib/hbc/utils/hash_validator.rb
index 6c8f95c3a4..f43bf173f4 100644
--- a/Library/Homebrew/cask/lib/hbc/utils/hash_validator.rb
+++ b/Library/Homebrew/cask/lib/hbc/utils/hash_validator.rb
@@ -2,6 +2,6 @@ module HashValidator
   def assert_valid_keys(*valid_keys)
     unknown_keys = keys - valid_keys
     return if unknown_keys.empty?
-    raise CaskError, %Q(Unknown keys: #{unknown_keys.inspect}. Running "#{UPDATE_CMD}" will likely fix it.)
+    raise %Q(Unknown keys: #{unknown_keys.inspect}. Running "brew update" will likely fix it.)
   end
 end