diff --git a/easystacks/software.eessi.io/2023.06/rebuilds/20250212-eb-4.9.4-R-bundle-CRAN-2023.12-rebuild-to-sync-exts-between-archs.yml b/easystacks/software.eessi.io/2023.06/rebuilds/20250212-eb-4.9.4-R-bundle-CRAN-2023.12-rebuild-to-sync-exts-between-archs.yml
new file mode 100644
index 0000000000..d60898ce60
--- /dev/null
+++ b/easystacks/software.eessi.io/2023.06/rebuilds/20250212-eb-4.9.4-R-bundle-CRAN-2023.12-rebuild-to-sync-exts-between-archs.yml
@@ -0,0 +1,6 @@
+# 2025.02.12
+# Rebuild R-bundle-CRAN to synchronise the extensions between archs.
+# This is necessary because the Zen4 version was not built with the same EB
+# version (and exts had changed)
+easyconfigs:
+  - R-bundle-CRAN-2023.12-foss-2023a.eb