set HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK, so that 'brew install' does not imply the upgrade or reinstallation of dependent packages. this is needed as github actions' image comes with a significant amount of pre-installed packages, and given we install llvm and zlib, a bunch of unrelated packages were being reinstalled. the corollary is that it is now our responsibility to manually upgrade/reinstall any dependents we are interested in. at the moment that's an empty set, and while it is likely to remain that way, here's a note of caution to future readers.
set HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK, so that 'brew install' does not imply the upgrade or reinstallation of dependent packages. this is needed as github actions' image comes with a significant amount of pre-installed packages, and given we install llvm and zlib, a bunch of unrelated packages were being reinstalled. the corollary is that it is now our responsibility to manually upgrade/reinstall any dependents we are interested in. at the moment that's an empty set, and while it is likely to remain that way, here's a note of caution to future readers.