key:value error ?

[Resonanz]

Using eframe_template as a basis. Add catppuccin-egui = { version = "5.2", default-features = false, features = ["egui28"] } to cargo.toml.

2024-08-14T01:26:07.450462Z ERROR Flycheck failed to run the following command: CommandHandle { program: "/home/rob/.cargo/bin/cargo", arguments: ["check", "--workspace", "--message-format=json-diagnostic-rendered-ansi", "--manifest-path", "/home/rob/Github/eframe_template/Cargo.toml", "--keep-going", "--all-targets"], current_dir: Some("/home/rob/Github/eframe_template") }, error=Cargo watcher failed, the command produced no valid metadata (exit code: ExitStatus(unix_wait_status(25856))):
   Compiling catppuccin-egui v5.2.0
error: unsupported output in build script of `catppuccin-egui v5.2.0`: `cargo::rerun-if-changed=src/themes.rs.tera`
Found a `cargo::key=value` build directive which is reserved for future use.
Either change the directive to `cargo:key=value` syntax (note the single `:`) or upgrade your version of Rust.
See https://doc.rust-lang.org/cargo/reference/build-scripts.html#outputs-of-the-build-script for more information about build script outputs.