1 files changed, 3 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/ocaml-modules/piqi-ocaml/default.nix b/nixpkgs/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
index 4f2e4693357f..8c0276bc9a7a 100644
--- a/nixpkgs/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
+++ b/nixpkgs/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, ocaml, findlib, piqi, stdlib-shims }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, ocaml, findlib, piqi, stdlib-shims, num }:
 
 stdenv.mkDerivation rec {
   version = "0.7.7";
@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ ocaml findlib ];
   buildInputs = [ piqi stdlib-shims ];
 
+  checkInputs  = [ num ];
+
   strictDeps = true;
 
   createFindlibDestdir = true;