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-rw-r--r--pkgs/development/ocaml-modules/csv/lwt.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/ocaml-modules/csv/lwt.nix b/pkgs/development/ocaml-modules/csv/lwt.nix
index b0f771209aa..c90dc019b9d 100644
--- a/pkgs/development/ocaml-modules/csv/lwt.nix
+++ b/pkgs/development/ocaml-modules/csv/lwt.nix
@@ -1,6 +1,6 @@
 { lib, buildDunePackage, ocaml, csv, ocaml_lwt }:
 
-if !lib.versionAtLeast ocaml.version "4.02"
+if lib.versionOlder ocaml.version "4.02"
 then throw "csv-lwt is not available for OCaml ${ocaml.version}"
 else