diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6dd2f47..1854860 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,7 @@ jobs:
           logger: pretty
           log-directives: nix_installer=trace
           backtrace: full
+          nix-installer-branch: main
           extra-conf: |
             experimental-features = impure-derivations
       - run: cat /etc/nix/nix.conf