diff --git a/easystacks/pilot.nessi.no/2023.06/eessi-2023.06-eb-4.9.1-2023a.yml b/easystacks/pilot.nessi.no/2023.06/eessi-2023.06-eb-4.9.1-2023a.yml
index 14dfa97ef2..3018901ca9 100644
--- a/easystacks/pilot.nessi.no/2023.06/eessi-2023.06-eb-4.9.1-2023a.yml
+++ b/easystacks/pilot.nessi.no/2023.06/eessi-2023.06-eb-4.9.1-2023a.yml
@@ -18,6 +18,7 @@ easyconfigs:
   - SuiteSparse-7.1.0-foss-2023a.eb
   - Hypre-2.29.0-foss-2023a.eb
   - netCDF-Fortran-4.6.1-gompi-2023a.eb
+  - ncdu-1.18-GCC-12.3.0.eb
   - R-bundle-Bioconductor-3.18-foss-2023a-R-4.3.2.eb:
       options:
         # see https://github.com/easybuilders/easybuild-easyconfigs/pull/20379