diff --git a/src/scripts/darwin.sh b/src/scripts/darwin.sh
index 269e16e0..b12d953a 100644
--- a/src/scripts/darwin.sh
+++ b/src/scripts/darwin.sh
@@ -69,7 +69,9 @@ add_brew_extension() {
   else
     add_brew_tap "$php_tap"
     add_brew_tap "$ext_tap"
-    sudo mv "$tap_dir"/"$ext_tap"/.github/deps/"$formula"/* "${core_repo:?}/Formula/" 2>/dev/null || true
+    if [[ -e "${core_repo:?}/Formula/" && -e "$tap_dir"/"$ext_tap"/.github/deps/"$formula" ]]; then
+      sudo mv "$tap_dir"/"$ext_tap"/.github/deps/"$formula"/* "${core_repo:?}/Formula/" 2>/dev/null || true
+    fi
     update_dependencies >/dev/null 2>&1
     handle_dependency_extensions "$formula" "$extension" >/dev/null 2>&1
     (brew install "${brew_opts[@]}" "$ext_tap/$formula@$version" >/dev/null 2>&1 && copy_brew_extensions "$formula") || pecl_install "$extension" >/dev/null 2>&1
@@ -136,7 +138,9 @@ update_dependencies() {
   patch_brew
   if ! [ -e /tmp/update_dependencies ]; then
     for repo in "$brew_repo" "$core_repo"; do
-      git_retry -C "$repo" fetch origin master && git -C "$repo" reset --hard origin/master
+      if [ -e "$repo" ]; then
+        git_retry -C "$repo" fetch origin master && git -C "$repo" reset --hard origin/master
+      fi
     done
     echo '' | sudo tee /tmp/update_dependencies >/dev/null 2>&1
   fi