diff --git a/Hash2Pub/default.nix b/Hash2Pub/default.nix
index 5d94f36..a0f664b 100644
--- a/Hash2Pub/default.nix
+++ b/Hash2Pub/default.nix
@@ -3,8 +3,7 @@
     name = "nixpkgs-pinned";
     url = https://github.com/NixOS/nixpkgs/;
     ref = "refs/heads/release-20.03";
-    rev = "08bd71704950d1dddcd55ddbf58adbd045e0ae50";
-    #rev = "6bbdce2b15665af6310069cc4f1e667e426c4356";
+    rev = "c778e137bdf921e7574f37f96874c247c5df768e";
   }) {},
   compiler ? "ghc865"
 }: