How to install a specific version of a package?

[BlackAsLight]

Output of brew config

HOMEBREW_VERSION: 4.2.21
ORIGIN: https://github.com/Homebrew/brew
HEAD: 82c2e743a5bcea725f9ca1429e3e21c3088ff904
Last commit: 4 days ago
Core tap JSON: 10 May 07:17 UTC
Core cask tap JSON: 10 May 07:17 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_firestorm_icestorm
Clang: 15.0.0 build 1500
Git: 2.39.3 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.4.0 => /usr/bin/curl
macOS: 14.4.1-arm64
CLT: 15.3.0.0.1.1708646388
Xcode: N/A
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: Found Ruby file outside surrealdb/tap tap formula directory.
(/opt/homebrew/Library/Taps/surrealdb/homebrew-tap/Formula):
  /opt/homebrew/Library/Taps/surrealdb/homebrew-tap/nightly.rb
  /opt/homebrew/Library/Taps/surrealdb/homebrew-tap/release.rb

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:
  glib

Description of issue

Everywhere I look on the internet it says to install a specific version I need to do brew install name@version, but it fails when I try to revert my version of Deno. brew install deno@1.43.1. I'd like to revert my version at the latest version (1.43.2) is currently seg-faulting.

brew install deno@1.43.1
Warning: No available formula with the name "deno@1.43.1".
==> Searching for similarly named formulae and casks...
Error: No formulae or casks found for deno@1.43.1.

[SMillerDev]

That's only supported for specific versions that are supported upstream like postgres@16 or python@3.11. If you want to determine your own version you'll need to use brew extract to extract a version.

[BlackAsLight]

Could you give an example of how I'd do that? I'm not so sure what tap is or what I'm meant to put there.

brew extract --version=1.43.1 --force deno
Usage: brew extract [--version=] [--force] formula tap

Look through repository history to find the most recent version of formula and
create a copy in tap. Specifically, the command will create the new formula
file at tap/Formula/formula@version.rb. If the tap is not installed
yet, attempt to install/clone the tap before continuing. To extract a formula
from a tap that is not homebrew/core use its fully-qualified form of
user/repo/formula.

      --version                    Extract the specified version of formula
                                   instead of the most recent.
  -f, --force                      Overwrite the destination formula if it
                                   already exists.
  -d, --debug                      Display any debugging information.
  -q, --quiet                      Make some output more quiet.
  -v, --verbose                    Make some output more verbose.
  -h, --help                       Show this message.

Error: Invalid usage: This command requires exactly 2 formula or tap arguments.