我想安装gsl 2.5（当前安装的是gsl 2.6），但是当我尝试安装时，这是我从自制软件中获得的：
brew install gsl@2.5
返回
Error: No available formula with the name "gsl@2.5"
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
git -C "$(brew --repo homebrew/core)" fetch --unshallow
Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.
我尝试过
git -C "$(brew --repo homebrew/core)" fetch --unshallow
，但之后也会发生同样的情况。有什么想法吗？