diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05ea48a..e966cb6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,4 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: cachix/install-nix-action@v12
-        with:
-          nix_path: nixpkgs=channel:nixos-20.09
       - run: ./test.sh
diff --git a/fetch.py b/fetch.py
index 974aeb0..c977251 100755
--- a/fetch.py
+++ b/fetch.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i python3 -p python3 curl nix
+#!nix-shell -I nixpkgs=./nixpkgs.nix -i python3 -p python3 curl nix
 
 import json
 import re