diff --git a/jobsets.nix b/jobsets.nix
index 9a72ffb..b89c43a 100644
--- a/jobsets.nix
+++ b/jobsets.nix
@@ -59,6 +59,8 @@ let
       gitUrls = {
         mateamt = "https://github.com/nek0/mateamt.git master 1";
         matebeamter = "https://github.com/nek0/matebeamter.git master 1";
+        # A few Haskell dependencies are broken in NixOS 19.09
+        nixpkgs = "https://github.com/NixOS/nixpkgs.git master";
       };
     };