step1、install ndk-pkg

step2、update ndk-pkg-formula-repository

ndk-pkg update

step3、build and install flex

ndk-pkg install flex

ndk-pkg formula view flex

{{ formula }}

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

ndk-pkg formula edit flex

after editing, you may want to rebuild this package ⤵︎

ndk-pkg install flex