diff --git a/src/scripts/darwin.sh b/src/scripts/darwin.sh
index 2dc25e1c3..9f75a3444 100644
--- a/src/scripts/darwin.sh
+++ b/src/scripts/darwin.sh
@@ -126,7 +126,8 @@ patch_brew() {
 # Helper function to update the dependencies.
 update_dependencies_helper() {
   dependency=$1
-  get -q -n "$core_repo/Formula/$dependency.rb" "https://raw.githubusercontent.com/Homebrew/homebrew-core/master/Formula/$dependency.rb"
+  [[ "${dependency:0:3}" = "lib" ]] && prefix=lib || prefix="${dependency:0:1}"
+  get -q -n "$core_repo/Formula/$prefix/$dependency.rb" "https://raw.githubusercontent.com/Homebrew/homebrew-core/master/Formula/$prefix/$dependency.rb"
   link_libraries "$dependency"
 }