diff --git a/copied_base/base/BUILD.gn b/copied_base/base/BUILD.gn
index 4b79af13d34e..ad916e67dca3 100644
--- a/copied_base/base/BUILD.gn
+++ b/copied_base/base/BUILD.gn
@@ -37,7 +37,6 @@ import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/sysroot.gni")
 import("//build/config/ui.gni")
 import("//build/nocompile.gni")
-import("//build/timestamp.gni")
 import("//build_overrides/build.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
@@ -103,6 +102,8 @@ if (is_fuchsia) {
   import("//third_party/fuchsia-sdk/sdk/build/fidl_library.gni")
 }
 
+_build_date_header = "$target_gen_dir/generated_build_date.h"
+
 if (is_cobalt) {
   use_perfetto_client_library = true
   enable_log_error_not_reached = false
@@ -943,6 +944,7 @@ component("base") {
     "version.h",
     "vlog.cc",
     "vlog.h",
+    _build_date_header,
   ]
 
 
@@ -4181,15 +4183,11 @@ if (is_win && toolchain_has_rust) {
   }
 }
 
-action("build_date") {
-  script = "write_build_date_header.py"
-
-  outputs = [ "$target_gen_dir/generated_build_date.h" ]
-
-  args = [
-    rebase_path("$target_gen_dir/generated_build_date.h", root_build_dir),
-    build_timestamp,
-  ]
+copy("build_date") {
+  # Reuse the file generated by //base:build_date_internal.
+  sources = [ "$root_build_dir/gen/base/generated_build_date_internal.h" ]
+  outputs = [ _build_date_header ]
+  deps = [ "//base:build_date_internal($default_toolchain)" ]
 }
 
 if (is_android || is_robolectric) {