step1、install Xcode

step2、install xcpkg

step3、update xcpkg-formula-repository

xcpkg update

step4、build and install nettle

xcpkg install nettle

xcpkg formula view nettle

{{ formula }}

if the formula of nettle dosn't meet your needs, you can edit it ⤵︎

xcpkg formula edit nettle

after editing, you may want to rebuild this package ⤵︎

xcpkg install nettle