diff --git a/pkgs/tools/networking/unbound/default.nix b/pkgs/tools/networking/unbound/default.nix
index d7ef54a2497d..974849d29460 100644
--- a/pkgs/tools/networking/unbound/default.nix
+++ b/pkgs/tools/networking/unbound/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     # get rid of runtime dependencies on $dev outputs
   + ''substituteInPlace "$lib/lib/libunbound.la" ''
     + stdenv.lib.concatMapStrings
-      (pkg: " --replace '-L${pkg.dev}/lib' '-L${pkg.out}/lib' ")
+      (pkg: " --replace '-L${pkg.dev}/lib' '-L${pkg.out}/lib' --replace '-R${pkg.dev}/lib' '-R${pkg.out}/lib'")
       buildInputs;
 
   meta = with stdenv.lib; {