Previous versions of folly

[novitae]

Output of brew config

HOMEBREW_VERSION: 4.4.21-103-g89d1d6b
ORIGIN: https://github.com/Homebrew/brew
HEAD: 89d1d6b8f4adb0b8f6678912f648dca2475b7c7c
Last commit: 70 minutes ago
Branch: master
Core tap JSON: 24 Feb 10:09 UTC
Core cask tap JSON: 24 Feb 10:09 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 10
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.3.7 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.7/bin/ruby
CPU: deca-core 64-bit arm_blizzard_avalanche
Clang: 16.0.0 build 1600
Git: 2.39.5 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.3.1-arm64
CLT: 16.2.0.0.1.1733547573
Xcode: 16.2
Rosetta 2: false

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: The following formulae have the same name as core formulae:
  blacktop/tap/go
  blacktop/tap/ipsw
  blacktop/tap/syft
  facebook/fb/watchman
Some of these can be resolved with:
  brew untap facebook/fb

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:
  pkg-config
  pycparser
  pipx
  cryptography
  cffi
  numpy

Description of issue

I would like to install previous versions of the folly package, however I can't find any ways. I tried by doing brew install folly@2025.02.10.00 (which is the previous version of the current 2025.02.17.00), but I get the following error:

Warning: No available formula with the name "folly@2025.02.10.00".
==> Searching for similarly named formulae and casks...
Error: No formulae or casks found for folly@2025.02.10.00.

Is there even a way to downgrade it ? Thank you

[daeho-ro]

You have to create your own tap, copy the previous version of Cask file, and install that. Homebrew does not support an arbitrary version in general.