[BUG] Nixos ffmpeg error #184

Step 1. Before you submit

• I have read the above instructions and am sure that this is supposed to be posted here.
• I've successfully updated to the latest versions following the updating guide.
• I've successfully updated the system packages to the latest.
• I've ticked the checkboxes without reading their contents

Step 2. Version info

Packages: not on Arch

Dots: not installed

Shell: version helper not available

Quickshell: not in PATH

Step 3. Describe the issue

NixOS build fails: undefined ffmpeg and missing dirtyRev

Environment

OS: NixOS 26.05
Architecture: x86_64-linux
Installation: Nix flake
Repository: https://github.com/caelestia-dots/cli

Description

While updating my NixOS configuration and running nh os switch, the Caelestia CLI flake failed to evaluate.

The first error was:

error: undefined variable 'ffmpeg'
at caelestia-dots/cli/default.nix:54

The default.nix function references ffmpeg in propagatedBuildInputs, but ffmpeg is missing from the function arguments.

After addressing that issue locally, I encountered another error:

error: attribute 'dirtyRev' missing
at flake.nix:29
rev = self.rev or self.dirtyRev;

My local workaround was to change the expression to:

rev = self.rev or "local";

After this change, nixos-rebuild dry-build --flake /etc/nixos#nixos completed successfully.

Expected behavior

The flake should evaluate successfully when used in a NixOS configuration, including when the source is a local flake without Git revision metadata.

Could these issues be fixed in the upstream repository?

Reminder

• I agree that it's usually impossible for others to help me without my logs.