diff --git a/Hash2Pub/Hash2Pub.cabal b/Hash2Pub/Hash2Pub.cabal
index 8955263..bf77284 100644
--- a/Hash2Pub/Hash2Pub.cabal
+++ b/Hash2Pub/Hash2Pub.cabal
@@ -46,7 +46,7 @@ category:            Network
 extra-source-files:  CHANGELOG.md
 
 common deps
-  build-depends:       base ^>=4.12.0.0, containers ^>=0.6.0.1, bytestring, utf8-string ^>=1.0.1.1, network ^>=2.8.0.1, time ^>=1.8.0.2, cmdargs ^>= 0.10, cryptonite ^>= 0.25, memory, binary-strict
+  build-depends:       base ^>=4.12.0.0, containers ^>=0.6.0.1, bytestring, utf8-string ^>=1.0.1.1, network ^>=2.8.0.1, time ^>=1.8.0.2, cmdargs ^>= 0.10, cryptonite ^>= 0.25, memory, binary-strict, async
   ghc-options:         -Wall
 
 
@@ -91,6 +91,8 @@ executable Hash2Pub
   -- Base language which the package is written in.
   default-language:    Haskell2010
 
+  ghc-options:         -threaded
+
 
 test-suite Hash2Pub-test
   -- Test dependencies.
@@ -111,3 +113,4 @@ test-suite Hash2Pub-test
   other-extensions:    OverloadedStrings
   build-depends:       hspec, Hash2Pub
 
+  ghc-options:         -threaded
diff --git a/Hash2Pub/default.nix b/Hash2Pub/default.nix
index 938bcc0..e380cde 100644
--- a/Hash2Pub/default.nix
+++ b/Hash2Pub/default.nix
@@ -3,14 +3,15 @@
     name = "nixpkgs-pinned";
     url = https://github.com/NixOS/nixpkgs/;
     ref = "refs/heads/release-20.03";
-    rev = "6bbdce2b15665af6310069cc4f1e667e426c4356";
+    rev = "08bd71704950d1dddcd55ddbf58adbd045e0ae50";
+    #rev = "6bbdce2b15665af6310069cc4f1e667e426c4356";
   }) {},
   compiler ? "ghc865"
 }:
 
 let
   hp = pkgs.haskell.packages."${compiler}";
-  drv = hp.callCabal2nix "Hash2Pub" ./. {};
+  drv = hp.callCabal2nix "Hash2Pub" ./Hash2Pub.cabal {};
 in
 {
   my_project = drv;