diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index c59b97a66e4..d71ab23c71b 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -108,7 +108,7 @@ let
       $machine->waitUntilSucceeds("cat /proc/swaps | grep -q /dev");
 
       # Check whether the channel works.
-      $machine->succeed("nix-env -i coreutils >&2");
+      $machine->succeed("nix-env -iA coreutils >&2");
       $machine->succeed("type -tP ls | tee /dev/stderr") =~ /.nix-profile/
           or die "nix-env failed";