fix(fleet): nix build fails — atlas-search/schema missing from fleetSrc fileset (atlas-core include_str! .sql files absent) #7641

Problem

nix build .#fleet (and therefore nix build .#nixosConfigurations.amd.config.system.build.toplevel, which includes the fleet package) fails on current main (df0e415c91, verified 2026-11-08 in a clean worktree by task 13007):

error: couldn't read `/build/source/atlas-search/crates/atlas-core/src/../../../schema/atlas_stage_v1.sql`: No such file or directory (os error 2)
error: couldn't read `/build/source/atlas-search/crates/atlas-core/src/../../../schema/stage_registry_v1.sql`: No such file or directory (os error 2)
error: could not compile `atlas-core` (lib) due to 2 previous errors
error: Cannot build '...-fleet-0.1.0.drv': builder failed with exit code 101

Root cause

• pkgs/atlas-search/crates/atlas-core/src/stage.rs:45 does include_str!("../../../schema/atlas_stage_v1.sql") and line 49 does the same for stage_registry_v1.sql. Both files exist at pkgs/atlas-search/schema/.
• pkgs/fleet/default.nix builds the fleet binary from a lib.fileset.toSource union (fleetSrc) containing only pkgs/fleet, ../atlas-search/Cargo.toml, and ../atlas-search/crates — ../atlas-search/schema is NOT in the fileset, so the .sql files are absent from the Nix build source. Local cargo builds from the full tree pass; only the Nix build fails.

Fix

Add ../atlas-search/schema to the fleetSrc fileset union in pkgs/fleet/default.nix.

Acceptance

• nix build .#fleet succeeds on main.
• nix build .#nixosConfigurations.amd.config.system.build.toplevel gets past the fleet-0.1.0 dependency (green, or any remaining failure is a different, separately filed defect).
• Found by: task 13007 (chore(deps): remove the nodejs_24 override once nixpkgs-unstable's repack passes installCheck #2727 verification) — the toplevel failure is pre-existing on clean main and unrelated to chore(deps): remove the nodejs_24 override once nixpkgs-unstable's repack passes installCheck #2727 (its nodejs_24 build passes).

Acceptance criteria

• nix build .#fleet succeeds on current main (and the toplevel build that includes the fleet package gets past the atlas-core compile).
• The fleetSrc fileset in pkgs/fleet/default.nix includes pkgs/atlas-search/schema, so both include_str! .sql files are present in the build source.
• No other include_str! path in the fleet build's dependency set is missing from the fileset (checked, not assumed).