diff --git a/nixos/modules/system/boot/stage-1.nix b/nixos/modules/system/boot/stage-1.nix
index c23b54ee65f9..494780f17485 100644
--- a/nixos/modules/system/boot/stage-1.nix
+++ b/nixos/modules/system/boot/stage-1.nix
@@ -247,7 +247,7 @@ let
             { src = "${pkgs.kmod-blacklist-ubuntu}/modprobe.conf"; }
             ''
               target=$out
-              ${pkgs.perl}/bin/perl -0pe 's/## file: iwlwifi.conf(.+?)##/##/s;' $src > $out
+              ${pkgs.buildPackages.perl}/bin/perl -0pe 's/## file: iwlwifi.conf(.+?)##/##/s;' $src > $out
             '';
           symlink = "/etc/modprobe.d/ubuntu.conf";
         }