brew install is broken

[grosser]

brew install https://raw.github.com/mzsanford/homebrew/libcld/Library/Formula/libcld.rb
Error: Non-checksummed download of libcld formula file from an arbitrary URL is unsupported! `brew extract` or `brew create` and `brew tap-new` to create a formula file in a tap on GitHub instead.

so I went with:

wget https://raw.github.com/mzsanford/homebrew/libcld/Library/Formula/libcld.rb
brew install --HEAD -s libcld.rb
Error: libcld: undefined method `md5' for #<Class:0x00007fd4af8f1ef8>

so I removed the md5

brew install --HEAD -s libcld.rb
Warning: Calling bottle :unneeded is deprecated! There is no replacement.
Please report this issue to the danmx/sigil tap (not Homebrew/brew or Homebrew/core):
  /usr/local/Homebrew/Library/Taps/danmx/homebrew-sigil/sigil.rb:10


Error: Failed to load cask: libcld.rb
Cask 'libcld' is unreadable: wrong constant name #<Class:0x00007fee1ea06fe0>
Warning: Treating libcld.rb as a formula.
==> Cloning https://github.com/mzsanford/cld.git
Updating /Users/mgrosser/Library/Caches/Homebrew/libcld--git
==> Checking out branch master
Already on 'master'
Your branch is up to date with 'origin/master'.
HEAD is now at 24586f4 Merge pull request #39 from Ludar-Pavel/master
Error: Your Command Line Tools are too outdated.
Update them from Software Update in System Preferences or run:
  softwareupdate --all --install --force

If that doesn't show you any updates, run:
  sudo rm -rf /Library/Developer/CommandLineTools
  sudo xcode-select --install

Alternatively, manually download them from:
  https://developer.apple.com/download/all/.
You should download the Command Line Tools for Xcode 13.1.

already got the commandline tools and xcode, so doubt that's the problem 🤷