diff --git a/pkgs/development/compilers/ponyc/default.nix b/pkgs/development/compilers/ponyc/default.nix
index a386abec95b..6cd407374db 100644
--- a/pkgs/development/compilers/ponyc/default.nix
+++ b/pkgs/development/compilers/ponyc/default.nix
@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation ( rec {
   name = "ponyc-${version}";
-  version = "0.11.4";
+  version = "0.12.2";
 
   src = fetchFromGitHub {
     owner = "ponylang";
     repo = "ponyc";
     rev = version;
-    sha256 = "0csssmc9dcm2ib9k5qhglnjyrqsmci9b5q0b5cxwvl5z1llib9hg";
+    sha256 = "1gp92fwfq9ic43c525p0idap99jq5fkjbijf0s8bxif3kng7rxbp";
   };
 
   buildInputs = [ llvm makeWrapper which ];
diff --git a/pkgs/development/compilers/ponyc/pony-stable.nix b/pkgs/development/compilers/ponyc/pony-stable.nix
index 6e669c97300..9bee8e299c0 100644
--- a/pkgs/development/compilers/ponyc/pony-stable.nix
+++ b/pkgs/development/compilers/ponyc/pony-stable.nix
@@ -1,13 +1,13 @@
 {stdenv, fetchFromGitHub, ponyc }:
 
 stdenv.mkDerivation {
-  name = "pony-stable-unstable-2017-01-03";
+  name = "pony-stable-unstable-2017-03-30";
 
   src = fetchFromGitHub {
     owner = "jemc";
     repo = "pony-stable";
-    rev = "0054b429a54818d187100ed40f5525ec7931b31b";
-    sha256 = "0libx8byzwqjjgxxyiiahiprzzp845xgbk09sx9bzban5cd5j0g5";
+    rev = "39890c7f11f79009630de6b551bd076868f7f5a2";
+    sha256 = "1w15dg4l03zzncpllwww8jhsj7z1wgvhf89n7agr9f1w9m2zpskc";
   };
 
   buildInputs = [ ponyc ];