diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 3eb14c77f6..eb09747127 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -155,6 +155,8 @@ (define-public camlboot
                  (install-file "ocamllex" bin)))))))
       (native-inputs
        `(("guile" ,guile-3.0)))
+      (properties
+       `(max-silent-time . 14400)) ; 4 hours, expected even on x86_64
       (home-page "https://github.com/Ekdohibs/camlboot")
       (synopsis "OCaml souce bootstrap")
       (description "OCaml is written in OCaml.  Its sources contain a pre-compiled