diff --git a/pkgs/applications/networking/mailreaders/mblaze/default.nix b/pkgs/applications/networking/mailreaders/mblaze/default.nix
index 0d73f161249d..6cfac41676cc 100644
--- a/pkgs/applications/networking/mailreaders/mblaze/default.nix
+++ b/pkgs/applications/networking/mailreaders/mblaze/default.nix
@@ -1,14 +1,16 @@
-{ stdenv, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub, libiconv }:
 
 stdenv.mkDerivation rec {
   name = "mblaze-${version}";
-  version = "0.2";
+  version = "0.3";
+
+  buildInputs = stdenv.lib.optionals stdenv.isDarwin [ libiconv ];
 
   src = fetchFromGitHub {
     owner = "chneukirchen";
     repo = "mblaze";
     rev = "v${version}";
-    sha256 = "0p97zfl35ilrnrx9ynj82igsb698m9klikfaicw5jhjpf6qp2n3y";
+    sha256 = "1jrn81rvw6qanlfppc12dkvpbmidzrq1lx3rfhvcsna55k3gjyw9";
   };
 
   makeFlags = "PREFIX=$(out)";