diff --git a/nix/soil/nixosProfiles/guix/default.nix b/nix/soil/nixosProfiles/guix/default.nix
index b552f4be..679d18d2 100644
--- a/nix/soil/nixosProfiles/guix/default.nix
+++ b/nix/soil/nixosProfiles/guix/default.nix
@@ -8,7 +8,7 @@
         enable = true;
 
         extraArgs = [
-          "--delete-generation"
+          "--delete-generations"
           "--optimize"
         ];
       };