Context

I downloaded the books Source code (zip file), extracted it, installed the dependencies (mix deps.get) and then compiled it (mix compile)

Error

I was then presented with the following error:

== Compilation error in file lib/fun_park/ride/fast_lane.ex ==
** (SyntaxError) invalid syntax found on lib/fun_park/ride/fast_lane.ex:73:32:
    error: syntax error before: fast
    │
 73 │     |> ensure_eligibility(ride)fast
    │                                ^
    │
    └─ lib/fun_park/ride/fast_lane.ex:73:32
    (elixir 1.19.5) lib/kernel/parallel_compiler.ex:529: anonymous fn/5 in Kernel.ParallelCompiler.spawn_workers/8

Fix

To get to a successful compile, I remove the stray fast by changing the following line from:

|> ensure_eligibility(ride)fast

to:

|> ensure_eligibility(ride)