diff --git a/pkgs/development/tools/rq/default.nix b/pkgs/development/tools/rq/default.nix
index 5fe73ed33f0a..89ba58ea5f53 100644
--- a/pkgs/development/tools/rq/default.nix
+++ b/pkgs/development/tools/rq/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, rustPlatform, libiconv, llvmPackages, v8 }:
+{ stdenv, lib, fetchFromGitHub, rustPlatform, libiconv, llvmPackages, v8 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "rq";
@@ -13,7 +13,8 @@ rustPlatform.buildRustPackage rec {
 
   cargoSha256 = "0c5vwy3c5ji602dj64z6jqvcpi2xff03zvjbnwihb3ydqwnb3v67";
 
-  buildInputs = [ llvmPackages.clang-unwrapped v8 ];
+  buildInputs = [ llvmPackages.clang-unwrapped v8 ] 
+  ++ lib.optionals stdenv.isDarwin [ libiconv ];
 
   configurePhase = ''
     export LIBCLANG_PATH="${llvmPackages.clang-unwrapped}/lib"