diff --git a/Formula/macdeploycheck.rb b/Formula/macdeploycheck.rb
index de0d5b5e9..174f9a93f 100644
--- a/Formula/macdeploycheck.rb
+++ b/Formula/macdeploycheck.rb
@@ -4,7 +4,7 @@ class Macdeploycheck < Formula
   version "0.1.0"
   # Homebrew requires a URL stanza. Use the script shipped in this tap (file://),
   # so installs always match the tapped revision.
-  url "file://#{File.expand_path("../../dist/macos/macdeploycheck.sh", __dir__)}"
+  url "file://#{File.expand_path("../dist/macos/macdeploycheck.sh", __dir__)}"
   sha256 :no_check
   license "MIT"
 
diff --git a/build_tools/macos/install_brew_deps.sh b/build_tools/macos/install_brew_deps.sh
index 878b8f0c7..1095825d1 100755
--- a/build_tools/macos/install_brew_deps.sh
+++ b/build_tools/macos/install_brew_deps.sh
@@ -56,6 +56,18 @@ if ! command -v brew >/dev/null 2>&1; then
   exit 1
 fi
 
+# Brewfile support (`brew bundle`) is built into modern Homebrew. The historical
+# tap `homebrew/bundle` has been deprecated and may be empty on newer Homebrew.
+# If `brew bundle` is missing, the fix is to update Homebrew itself.
+if ! brew bundle --help >/dev/null 2>&1; then
+  run_with_heartbeat "Updating Homebrew (required for 'brew bundle')" bash -lc "brew update"
+  if ! brew bundle --help >/dev/null 2>&1; then
+    echo "Error: This Homebrew installation does not provide 'brew bundle'." >&2
+    echo "Update Homebrew (e.g. 'brew update') or reinstall Homebrew, then re-run this script." >&2
+    exit 1
+  fi
+fi
+
 # Homebrew taps are git clones; local formula changes must be committed to be visible.
 if command -v git >/dev/null 2>&1 && git -C "$repo_root" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   if git -C "$repo_root" status --porcelain Formula/ | grep -q .; then