Handle cases where the command isn't present when trying to signal.
Handle cases where the command isn't present when trying to signal.

Shopify/agent,Jasperswaagman/agent,buildkite/agent,buildkite/agent,grosskur/agent,es/agent,es/agent,Shopify/agent,Jasperswaagman/agent,es/agent,grosskur/agent,Shopify/agent,grosskur/agent,Jasperswaagman/agent,buildkite/agent