diff --git a/nix/haskell-nix-src.json b/nix/haskell-nix-src.json
index 4bd6b63f442..ea4a899b23a 100644
--- a/nix/haskell-nix-src.json
+++ b/nix/haskell-nix-src.json
@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/input-output-hk/haskell.nix",
-  "rev": "e5799fabef7fd997e818fff8491cb8b1ce155a88",
-  "date": "2019-12-09T15:22:34+13:00",
-  "sha256": "1064l9jgw3g6d78pr2nwm0shib24a69fsqq6cb0bv9wax0jbdwva",
+  "rev": "057eb445317cba9c7a413420e7d5f9ed910e1c4a",
+  "date": "2019-12-10T16:48:04+13:00",
+  "sha256": "0f66y39il8q936lyy1j1kw1b79lgv6h9idjsys8nrm78z076qr9r",
   "fetchSubmodules": false
 }