Add support for parsing the flake.lock.

src/nix_util/high_level.rs

@@ -17,6 +17,7 @@ pub(crate) async fn nixos_build_target<B, F, A, TN>(
     flake_path: F,
     attr: A,
     target_name: TN,
+    build_id: i64,
 ) -> Result<()>
 where
     B: AsRef<Path>,
@@ -55,7 +56,7 @@ where
 
     let child = command.spawn()?;
 
-    let mut running_build = RunningBuild::new(db_handle)?;
+    let mut running_build = RunningBuild::new(db_handle, build_id)?;
     running_build.run_to_completion(child, target_name).await?;
 
     Ok(())