Merge pull request ocaml#22739 from samoht/irmin-layers

old version of irmin-layers needs an old version of mtime

Author: kit-ty-kate

packages/irmin-layers/irmin-layers.2.3.0/opam

@@ -16,7 +16,7 @@ build: [
 depends: [
   "ocaml"      {>= "4.03.0"}
   "dune"       {>= "2.7.0"}
-  "mtime"      {>= "1.0.0"}
+  "mtime"      {>= "1.0.0" & < "2.0"}
   "irmin"      {= version}
   "logs"
   "lwt"