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-rw-r--r--pkgs/top-level/ocaml-packages.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index d41d5b97f183..a56343713fe2 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -387,6 +387,10 @@ let
       lwt = ocaml_lwt;
     };
 
+    num = if lib.versionOlder "4.06" ocaml.version
+      then callPackage ../development/ocaml-modules/num {}
+      else null;
+
     ocaml_batteries = callPackage ../development/ocaml-modules/batteries { };
 
     comparelib = callPackage ../development/ocaml-modules/comparelib { };