diff --git a/easystacks/software.eessi.io/2026.06/eessi-2026.06-eb-5.4.0-2026.1.yml b/easystacks/software.eessi.io/2026.06/eessi-2026.06-eb-5.4.0-2026.1.yml
index 94954d7c8a..cd4a3467ad 100644
--- a/easystacks/software.eessi.io/2026.06/eessi-2026.06-eb-5.4.0-2026.1.yml
+++ b/easystacks/software.eessi.io/2026.06/eessi-2026.06-eb-5.4.0-2026.1.yml
@@ -12,3 +12,7 @@ easyconfigs:
   - lit-18.1.8-GCCcore-15.2.0.eb
   - git-2.52.0-GCCcore-15.2.0.eb
   - Z3-4.15.4-GCCcore-15.2.0.eb
+  - spin-0.18-GCCcore-15.2.0.eb
+  - hypothesis-6.153.2-GCCcore-15.2.0.eb
+  - pybind11-3.0.4-GCCcore-15.2.0.eb
+  - meson-python-0.19.0-GCCcore-15.2.0.eb