diff --git a/dev/tasks/homebrew-formulae/apache-arrow.rb b/dev/tasks/homebrew-formulae/apache-arrow.rb
index d2b99fd47573..544a5e318d83 100644
--- a/dev/tasks/homebrew-formulae/apache-arrow.rb
+++ b/dev/tasks/homebrew-formulae/apache-arrow.rb
@@ -71,7 +71,7 @@ def install
     # We set `ARROW_ORC=OFF` because it fails to build with Protobuf 27.0
     args = %W[
       -DCMAKE_INSTALL_RPATH=#{rpath}
-      -DLLVM_ROOT=#{Formula["llvm"].opt_prefix}
+      -DLLVM_ROOT=#{formula_opt_prefix("llvm")}
       -DARROW_DEPENDENCY_SOURCE=SYSTEM
       -DARROW_ACERO=ON
       -DARROW_COMPUTE=ON
diff --git a/dev/tasks/macros.jinja b/dev/tasks/macros.jinja
index 5b74999d958c..161c3eeb9ad7 100644
--- a/dev/tasks/macros.jinja
+++ b/dev/tasks/macros.jinja
@@ -175,7 +175,7 @@ env:
         # Make sure there's only one
         sed -i '' -E -e 's@.git.git@.git@' ${formula}
         cat ${formula}
-        cp ${formula} $(brew --repository homebrew/core)/Formula/
+        cp ${formula} $(brew --repository homebrew/core)/Formula/a/
       done
 {% endmacro %}