diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index a2d1b2852d..144b02e7a4 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -485,8 +485,9 @@ MesCC-Tools), and finally M2-Planet.")
            (search-path-specification
             (variable "MES_PREFIX")
             (separator #f)
-            (files '("")))))))
-
+            (files '("")))))
+    ;; This can take up to 3 days on riscv64-linux.
+    (properties `((timeout . ,(* 3 24 60 60))))))
 
 (define tcc-boot0
   ;; Pristine tcc cannot be built by MesCC, we are keeping a delta of 30