Cask: Can't install Heimdall

[SeanHayes]

Output of brew config

HOMEBREW_VERSION: 4.6.14
ORIGIN: https://github.com/Homebrew/brew
HEAD: f650b91290412d9300b6259ebaae55396a1536b9
Last commit: 8 hours ago
Branch: stable
Core tap JSON: 26 Sep 23:19 UTC
Core cask tap JSON: 26 Sep 23:19 UTC
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_EDITOR: nano
HOMEBREW_FORBID_PACKAGES_FROM_PATHS: set
HOMEBREW_MAKE_JOBS: 12
Homebrew Ruby: 3.4.5 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/3.4.5/bin/ruby
CPU: dodeca-core 64-bit kabylake
Clang: 17.0.0 build 1700
Git: 2.39.5 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.7-x86_64
CLT: 26.0.0.0.1.1757719676
Xcode: 16.4

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed casks are deprecated or disabled.
You should find replacements for the following casks:
  osxfuse
  soundflower

Warning: You have the following deprecated Cask taps installed:
  caskroom/cask
Please remove them with:
  brew untap caskroom/cask

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  icu4c@76
  [email protected]
  [email protected]

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/ss_conn_lib2.dylib

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  handbrake

Warning: Homebrew's "sbin" was not found in your PATH but you have installed
formulae that put executables in /usr/local/sbin.
Consider setting your PATH for example like so:
  echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.profile

Description of issue

$ brew install --cask heimdall-suite
==> Caveats
heimdall-suite requires a kernel extension to work.
If the installation fails, retry after you enable it in:
  System Settings → Privacy & Security

For more information, refer to vendor documentation or this Apple Technical Note:
  https://developer.apple.com/library/content/technotes/tn2459/_index.html

==> Downloading https://bitbucket.org/benjamin_dobell/heimdall/downloads/heimdall-suite-1.4.0-mac.dmg
Already downloaded: /Users/myuser/Library/Caches/Homebrew/downloads/dd399b7fba68601b77b9734df824f20ebafeff80dddac779b4254093c2979d5c--heimdall-suite-1.4.0-mac.dmg
==> Installing Cask heimdall-suite
==> Running installer for heimdall-suite with `sudo` (which may request your password)...
Password:
installer: Package name is Heimdall Suite 1.4.0
installer: Installing at base path /
installer: The install failed. (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance. The package is attempting to install content to the system volume.)
==> Purging files for version 1.4.0 of Cask heimdall-suite
Error: Failure while executing; `/usr/bin/sudo -u root -E LOGNAME=myuser USER=myuser USERNAME=myuser -- /usr/sbin/installer -pkg /usr/local/Caskroom/heimdall-suite/1.4.0/Heimdall\ Suite\ 1.4.0.pkg -target /` exited with 1. Here's the output:
installer: Package name is Heimdall Suite 1.4.0
installer: Installing at base path /
installer: The install failed. (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance. The package is attempting to install content to the system volume.)

Relevant casks

https://formulae.brew.sh/cask/heimdall-suite

[daeho-ro]

installer: The install failed. (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance. The package is attempting to install content to the system volume.)

installer failed, and so you'd better to ask upstream.