diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 108907ca70..93c6d36c28 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -1743,6 +1743,7 @@ (define-public ocaml-ppx-tools
        (uri (git-reference
              (url "https://github.com/alainfrisch/ppx_tools.git")
              (commit version)))
+       (file-name (git-file-name name version))
        (sha256 (base32
                 "1ww4cspdpgjjsgiv71s0im5yjkr3544x96wsq1vpdacq7dr7zwiw"))))
     (build-system ocaml-build-system)