It would be helpful to be able to manually override a dependency, especially with how quickly Crystal changes.

Let's say for example that I have a dependency called taco_shard and it relies on another dependency called cheese_shard. Everything works but then a new version of Crystal makes a change that breaks cheese_shard. cheese_shard is no longer maintained so you fork it to make changes to make it work with the new Crystal. The problem is that you don't have a way to easily override that dependency without also forking taco_shard. It would be awesome to be able to just add something to shard.yml that overrides the version/resolver:

cheese_shard:
  github: myfork/cheese_shard
  override: true # say that it is ok to override what `taco_shard` specified

So even if taco_shard says it should use original/cheese_shard my shard.yml would override that and use the specific fork. This could also work for versions.

Prior art

• override option in Elixir mix: https://hexdocs.pm/mix/Mix.Tasks.Deps.html#module-dependency-definition-options (search for override)