diff --git a/pkgs/development/tools/irony-server/default.nix b/pkgs/development/tools/irony-server/default.nix
index 2f8afb176e6..2a7a7b1a16a 100644
--- a/pkgs/development/tools/irony-server/default.nix
+++ b/pkgs/development/tools/irony-server/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   pname = "irony-server";
   inherit (irony) src version;
 
-  nativeBuildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake llvmPackages.llvm.dev ];
   buildInputs = [ llvmPackages.libclang llvmPackages.llvm ];
 
   dontUseCmakeBuildDir = true;