diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bb8f0f7..f748ae1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,7 +19,6 @@ jobs:
       - uses: cachix/install-nix-action@v13
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210429_d15a196/install
-          install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
           extra_nix_config: |
             experimental-features = nix-command flakes
       - uses: cachix/cachix-action@v10
@@ -40,7 +39,6 @@ jobs:
       - uses: cachix/install-nix-action@v13
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210429_d15a196/install
-          install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
           extra_nix_config: |
             experimental-features = nix-command flakes
       - uses: cachix/cachix-action@v10