diff --git a/config/default.nix b/config/default.nix
index 32f39064..5b7e68c3 100644
--- a/config/default.nix
+++ b/config/default.nix
@@ -213,7 +213,7 @@
   # does not suceed on installation which is okay
   system.activationScripts.deleteOldSystemProfiles = lib.mkIf config.nix.gc.automatic ''
     echo "Deleting old system profiles..."
-    /run/current-system/sw/bin/nix-env --profile /nix/var/nix/profiles/system --delete-generations +10 || true
+    ${config.nix.package}/bin/nix-env --profile /nix/var/nix/profiles/system --delete-generations +10 || true
   '';
 
   systemd = {