diff --git a/xcodeproj/internal/bazel_integration_files/generate_index_build_bazel_dependencies.sh b/xcodeproj/internal/bazel_integration_files/generate_index_build_bazel_dependencies.sh
index 4c67d3d4e..1939ed91f 100755
--- a/xcodeproj/internal/bazel_integration_files/generate_index_build_bazel_dependencies.sh
+++ b/xcodeproj/internal/bazel_integration_files/generate_index_build_bazel_dependencies.sh
@@ -10,11 +10,12 @@ readonly config="${BAZEL_CONFIG}_indexbuild"
 output_groups=(
   # Compile params
   "bc $BAZEL_TARGET_ID"
-  # Products (i.e. bundles) and index store data. The products themselves aren't
-  # used, they cause transitive files to be created. We use
-  # `--remote_download_regex` below to collect the files we care
+  # Indexstores and their filelist. Requesting indexstore directories triggers
+  # transitive Swift compilation (producing swiftmodules, indexstores, and
+  # generated headers) without linking, avoiding large product binaries. We use
+  # `--remote_download_regex` below to download the files we care
   # about.
-  "bp $BAZEL_TARGET_ID"
+  "bi $BAZEL_TARGET_ID"
 )
 
 indexstores_filelists=()
diff --git a/xcodeproj/internal/files/output_files.bzl b/xcodeproj/internal/files/output_files.bzl
index 3b19c0f5a..1565701ee 100644
--- a/xcodeproj/internal/files/output_files.bzl
+++ b/xcodeproj/internal/files/output_files.bzl
@@ -262,8 +262,17 @@ def _collect_output_files(
         transitive = [transitive_products],
     )
 
+    # Indexing output group: contains indexstores (to trigger Swift compilation)
+    # and the indexstores filelist (for import_indexstores). Unlike `bp`, this
+    # does not include linked products, avoiding large binary materialization.
+    indexing_depset = memory_efficient_depset(
+        [indexstores_filelist],
+        transitive = [transitive_indexstores],
+    )
+
     direct_group_list = [
         ("bc {}".format(id), transitive_compile_params),
+        ("bi {}".format(id), indexing_depset),
         ("bl {}".format(id), transitive_link_params),
         (products_output_group_name, products_depset),
     ]