gleam build
Downloading packages
 Downloaded 40 packages in 0.08s
  Compiling argv
  Compiling gleam_stdlib
  Compiling edit_distance
  Compiling filepath
  Compiling glexer
  Compiling glance
  Compiling gleam_json
  Compiling gleam_community_colour
  Compiling gleam_regexp
  Compiling gleam_community_ansi
  Compiling gleam_erlang
  Compiling justin
  Compiling rank
  Compiling simplifile
  Compiling term_size
  Compiling trie_again
  Compiling birdie
  Compiling gleam_yielder
  Compiling ranger
  Compiling birl
  Compiling envoy
  Compiling platform
  Compiling directories
  Compiling exception
  Compiling gleam_crypto
  Compiling gleam_http
  Compiling gleam_otp
  Compiling snag
  Compiling tom
  Compiling gleescript
warning: Deprecated value used
   ┌─ /tmp/tmp2jib8xd8/girlchesser/girlchesser-tmp/build/packages/gleescript/src/gleescript.gleam:77:35
   │
77 │   let assert Ok(result) = dynamic.result(Ok, Ok)(result)
   │                                   ^^^^^^ This value has been deprecated

It was deprecated with this message: Please use the gleam/dynamic/decode
module

  Compiling gleeunit
  Compiling logging
  Compiling telemetry
error: Program not found

The program `rebar3` was not found. Is it installed?

Documentation for installing Rebar3 can be viewed here:
https://rebar3.org/docs/getting-started/

make: *** [Makefile:6: build] Error 1