diff --git a/hydra-project.json b/hydra-project.json
index ac79107..24203d7 100644
--- a/hydra-project.json
+++ b/hydra-project.json
@@ -10,6 +10,7 @@
     "emailoverride": "",
     "keepnr": 10,
     "inputs": {
+        "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs-channels nixos-18.09", "emailresponsible": false },
         "nixScripts": { "type": "git", "value": "git://github.com/m-labs/nix-scripts.git", "emailresponsible": false }
     }
 }