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-rw-r--r--pkgs/development/compilers/stanc/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/compilers/stanc/default.nix b/pkgs/development/compilers/stanc/default.nix
index 3b35e3d214c..83ffc7773b0 100644
--- a/pkgs/development/compilers/stanc/default.nix
+++ b/pkgs/development/compilers/stanc/default.nix
@@ -8,6 +8,7 @@ ocamlPackages.buildDunePackage rec {
   version = "2.32.0";
 
   minimalOCamlVersion = "4.12";
+  duneVersion = "3";
 
   src = fetchFromGitHub {
     owner = "stan-dev";