* gnu/packages/ocaml.scm (sexplib0): Update to 0.12-preview.120.18+252.
---
 gnu/packages/ocaml.scm | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 986e435f4..5f95591d9 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -4903,27 +4903,37 @@ exclusion algorithms are typical examples of such systems.")
 (define-public ocaml-sexplib0
   (package
     (name "ocaml-sexplib0")
-    (version "0.11.0")
+    (version "0.12-preview.120.18+252")
     (home-page "https://github.com/janestreet/sexplib0")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url (string-append home-page ".git"))
-             (commit (string-append "v" version))))
+             (commit "7e602a00a9b7c037f3717cc60577a2aad8941830")))
        (file-name (git-file-name name version))
        (sha256
         (base32
-         "07v3ggyss7xhfv14bjk1n87sr42iqwj4cgjiv2lcdfkqk49i2bmi"))))
+         "0hrxy52nbnrd9l9v66klghsdy7xnbsjk85fb1rdkhcjcr38jnmad"))))
     (build-system dune-build-system)
     (arguments
-     '(#:tests? #f)) ;no tests
+     '(#:tests? #f ;no tests
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (invoke "dune" "install"
+                     (string-append "--libdir="
+                                    (assoc-ref outputs "out")
+                                    "/lib/ocaml/site-lib")
+                     (string-append "--prefix="
+                                    (assoc-ref outputs "out"))))))))
     (synopsis "Library containing the definition of S-expressions and some
 base converters")
     (description "Part of Jane Street's Core library The Core suite of
 libraries is an industrial strength alternative to OCaml's standard library
 that was developed by Jane Street, the largest industrial user of OCaml.")
-(license license:expat)))
+    (license license:expat)))
 
 (define-public ocaml-parsexp
   (package
-- 
2.20.1