diff --git a/easystacks/software.eessi.io/2026.06/additional_arch/riscv64/generic/eessi-2026.06-eb-5.4.0-2026.1.yml b/easystacks/software.eessi.io/2026.06/additional_arch/riscv64/generic/eessi-2026.06-eb-5.4.0-2026.1.yml
index b45ec09e70..cd2aa5fc40 100644
--- a/easystacks/software.eessi.io/2026.06/additional_arch/riscv64/generic/eessi-2026.06-eb-5.4.0-2026.1.yml
+++ b/easystacks/software.eessi.io/2026.06/additional_arch/riscv64/generic/eessi-2026.06-eb-5.4.0-2026.1.yml
@@ -1,2 +1,8 @@
 easyconfigs:
   - JupyterLab-4.5.8-GCCcore-15.2.0.eb
+  - LLVM-21.1.8-GCCcore-15.2.0.eb:
+     options:
+        # see https://github.com/easybuilders/easybuild-easyconfigs/pull/26939
+        from-commit: daac14b2eea512590292627bbc094ec0a44318d2
+        # see https://github.com/easybuilders/easybuild-easyblocks/pull/4178
+        include-easyblocks-from-commit: 1e945d5f38bfefda6ef3ce9443e1890a80b644aa