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-rw-r--r--pkgs/development/ocaml-modules/otr/default.nix4
1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/development/ocaml-modules/otr/default.nix b/pkgs/development/ocaml-modules/otr/default.nix
index dfee365cd750..39e7ce754d27 100644
--- a/pkgs/development/ocaml-modules/otr/default.nix
+++ b/pkgs/development/ocaml-modules/otr/default.nix
@@ -1,5 +1,5 @@
 {stdenv, buildOcaml, fetchFromGitHub, ocamlbuild, findlib, topkg, ocaml, opam,
- ppx_tools, ppx_sexp_conv, cstruct, sexplib, result, nocrypto, astring}:
+ ppx_tools, ppx_sexp_conv, cstruct, ppx_cstruct, sexplib, result, nocrypto, astring}:
 
 let ocamlFlags = "-I ${findlib}/lib/ocaml/${ocaml.version}/site-lib/"; in
 
@@ -16,7 +16,7 @@ buildOcaml rec {
     sha256 = "07zzix5mfsasqpqdx811m0x04gp8mq1ayf4b64998k98027v01rr";
   };
 
-  buildInputs = [ ocamlbuild findlib topkg ppx_tools ppx_sexp_conv opam ];
+  buildInputs = [ ocamlbuild findlib topkg ppx_tools ppx_sexp_conv opam ppx_cstruct ];
   propagatedBuildInputs = [ cstruct sexplib result nocrypto astring ];
 
   buildPhase = ''