diff --git a/easystacks/software.eessi.io/2025.06/eessi-2025.06-eb-5.1.2-001-system.yml b/easystacks/software.eessi.io/2025.06/eessi-2025.06-eb-5.1.2-001-system.yml
index e6e4e8c20c..c8340c4e87 100644
--- a/easystacks/software.eessi.io/2025.06/eessi-2025.06-eb-5.1.2-001-system.yml
+++ b/easystacks/software.eessi.io/2025.06/eessi-2025.06-eb-5.1.2-001-system.yml
@@ -4,3 +4,4 @@ easyconfigs:
       options:
         # see https://github.com/easybuilders/easybuild-easyconfigs/pull/24402
         from-commit: b83c437b11d31e2b8bb6ac8eb683a1b24e0dc810
+  - zsh-5.9.eb