digikam doesn't find jpeg-xl

[kevinbader]

Output of brew config

HOMEBREW_VERSION: 4.2.3
ORIGIN: https://github.com/Homebrew/brew
HEAD: b3751bca8c4a3c76107d5aa3b75b81db93cf4bb6
Last commit: 31 hours ago
Core tap JSON: 08 Jan 20:52 UTC
Core cask tap JSON: 08 Jan 20:52 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 3.1.4 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/bin/ruby
CPU: octa-core 64-bit arm_blizzard_avalanche
Clang: 15.0.0 build 1500
Git: 2.43.0 => /opt/homebrew/bin/git
Curl: 8.4.0 => /usr/bin/curl
macOS: 14.2.1-arm64
CLT: 15.1.0.0.1.1700200546
Xcode: N/A
Rosetta 2: false

Output of brew doctor

Your system is ready to brew.

Description of issue

Digikam supports jpeg-xl, but with jpeg-xl 0.9.0 installed, digikam still reports "0 Tools" for the "Convert to JXL" plugin. While I could configure the path to the brew-installed ExifTool in digikam's settings, I don't find a similar option for jpeg-xl (cjxl). I'm unsure whether this needs to be fixed with digikam or brew; I'm asking for help here first, as my hunch is that it might be fixable by some PATH setting or something (since I would've expected digikam to pick up ExifTool automatically, since brew's bin dir is in the PATH). Thanks for any pointers!

Relevant casks

digikam