Debugging errors in Process Compose

February 9th, 2026

Today, I had an issue with a Nix development environment that uses services-flake.

I ran nix run and the project started, only to encounter an error and close before I could read the error message.

I found that Process Compose as an option to disable the TUI and output the text (including the error message) to the screen.

This was my updated command:

nix run -- --tui=false

This was enough for me to see the error message and resolve the issue.