diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 13af740..702fc54 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,9 +13,9 @@ jobs:
       - name: Debug
         run: |
           cat /etc/hosts
-          curl -v https://heise.de
-          curl -v https://fh2.ch
-          curl -v https://git.qo.is
+          nix run nixpkgs#curl -v https://heise.de
+          nix run nixpkgs#curl -v https://fh2.ch
+          nix run nixpkgs#curl -v https://git.qo.is
           git clone https://git.qo.is/qo.is/infrastructure-private.git /tmp/private
 
       - name: Initialize CI