diff --git a/pkgs/applications/networking/mailreaders/mailnag/default.nix b/pkgs/applications/networking/mailreaders/mailnag/default.nix
index 7720fd69eeb..6b8cf89fc75 100644
--- a/pkgs/applications/networking/mailreaders/mailnag/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailnag/default.nix
@@ -5,11 +5,11 @@
 
 python2Packages.buildPythonApplication rec {
   name = "mailnag-${version}";
-  version = "1.1.0";
+  version = "1.2.1";
 
   src = fetchurl {
     url = "https://github.com/pulb/mailnag/archive/v${version}.tar.gz";
-    sha256 = "0li4kvxjmbz3nqg6bysgn2wdazqrd7gm9fym3rd7148aiqqwa91r";
+    sha256 = "ec7ac027d93bc7d88fc270858f5a181453a6ff07f43cab20563d185818801fee";
   };
 
   buildInputs = [
@@ -30,6 +30,12 @@ python2Packages.buildPythonApplication rec {
     done
   '';
 
+  buildPhase = "";
+
+  installPhase = "python2 setup.py install --prefix=$out";
+
+  doCheck = false;
+
   meta = with stdenv.lib; {
     description = "An extensible mail notification daemon";
     homepage = https://github.com/pulb/mailnag;