This is an attempt — so far unsuccessful — to implement a proof of
Alpha-conversion is easy by Thorsten
Altenkirch in Lean.

Get

Clone the repository and initialize and clone the submodules:

$ git clone --recurse-submodules https://github.com/spl/alpha-conversion-is-easy.git acie

Build

Normal build

$ make

This will build a “release” version of lean. See the relevant
instructions for building on your
platform.

It will then build the repository code.

Debug build

$ make CMAKE_BUILD_TYPE=DEBUG

The only difference from the normal build is that a “debug” version of lean is
built.