diff --git a/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml b/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
index 77287f0daf..03c9ec8f98 100644
--- a/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
+++ b/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
@@ -8,3 +8,7 @@ easyconfigs:
         # see https://github.com/easybuilders/easybuild-easyblocks/pull/3496
         include-easyblocks-from-commit: 60633b0acfd41a0732992d9e16800dae71a056eb
   - Cython-3.0.10-GCCcore-13.2.0.eb
+  - Mustache-1.3.3-foss-2023b.eb:
+      options:
+        # see https://github.com/easybuilders/easybuild-easyconfigs/pull/21783
+        from-commit: 5fa3db9eb36f91cba3fbf351549f8ba2849abc33