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-rw-r--r--pkgs/development/ocaml-modules/elpi/default.nix5
1 files changed, 4 insertions, 1 deletions
diff --git a/pkgs/development/ocaml-modules/elpi/default.nix b/pkgs/development/ocaml-modules/elpi/default.nix
index cc53f25b578cc..1c60c963ed911 100644
--- a/pkgs/development/ocaml-modules/elpi/default.nix
+++ b/pkgs/development/ocaml-modules/elpi/default.nix
@@ -36,9 +36,12 @@ buildDunePackage rec {
 
   minimalOCamlVersion = "4.04";
 
-  buildInputs = [ perl ncurses ]
+  # atdgen is both a library and executable
+  nativeBuildInputs = [ perl camlp5 ]
   ++ lib.optional (lib.versionAtLeast version "1.15" || version == "dev") menhir
   ++ lib.optional (lib.versionAtLeast version "1.16" || version == "dev") atdgen;
+  buildInputs = [ ncurses ]
+  ++ lib.optional (lib.versionAtLeast version "1.16" || version == "dev") atdgen;
 
   propagatedBuildInputs = [ re stdlib-shims ]
   ++ (if lib.versionAtLeast version "1.15" || version == "dev"