From eb79eece79c9362c4d605db5c26742c8e64b2443 Mon Sep 17 00:00:00 2001
From: Moritz Angermann <moritz@zw3rk.com>
Date: Sat, 17 Oct 2026 06:10:16 +0900
Subject: [PATCH] Preserve mobile component project metadata

---
 scripts/nix/mobile-library.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/nix/mobile-library.nix b/scripts/nix/mobile-library.nix
index deff7c5f58..60eb44a500 100644
--- a/scripts/nix/mobile-library.nix
+++ b/scripts/nix/mobile-library.nix
@@ -4,7 +4,12 @@
 # the normal install phase. The compiler is the exact slice/TH wrapper.
 let withComponentPhases = component: change: component.overrideAttrs (old:
   change old // {
-    passthru = (old.passthru or {}) // {
+    # overrideAttrs drops the project/package handles that haskell.nix adds
+    # outside the derivation. Keep them for focused component diagnostics.
+    passthru = (old.passthru or {}) // (pkgs.lib.intersectAttrs {
+      project = null;
+      package = null;
+    } component) // {
       inherit (component) checkAgainstPlan;
       isSlice = true;
     };