diff --git a/.github/workflows/pd-externals.yml b/.github/workflows/pd-externals.yml
index 96ba24e7..7ca4865c 100644
--- a/.github/workflows/pd-externals.yml
+++ b/.github/workflows/pd-externals.yml
@@ -67,7 +67,7 @@ jobs:
       - name: build externals
         working-directory: ssr/flext
         run: |
-          make install DESTDIR=build PDLIBDIR=
+          make install DESTDIR=build PDLIBDIR= arch="arm64 x86_64"
       - name: Fix pd_darwin dependencies
         working-directory: ssr/flext
         run: |