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-rw-r--r--pkgs/development/ocaml-modules/paf/le.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/development/ocaml-modules/paf/le.nix b/pkgs/development/ocaml-modules/paf/le.nix
index 5c07eba3aab0e..28345a6cdc564 100644
--- a/pkgs/development/ocaml-modules/paf/le.nix
+++ b/pkgs/development/ocaml-modules/paf/le.nix
@@ -19,6 +19,8 @@ buildDunePackage {
     src
   ;
 
+  duneVersion = "3";
+
   propagatedBuildInputs = [
     paf
     duration