diff --git a/modules/installer/cd-dvd/installation-cd-base.nix b/modules/installer/cd-dvd/installation-cd-base.nix
index edcbed6e0b9..5c67c8e2a9d 100644
--- a/modules/installer/cd-dvd/installation-cd-base.nix
+++ b/modules/installer/cd-dvd/installation-cd-base.nix
@@ -32,6 +32,4 @@ with pkgs.lib;
   # To speed up installation a little bit, include the complete stdenv
   # in the Nix store on the CD.
   isoImage.storeContents = [ pkgs.stdenv pkgs.busybox ];
-
-  environment.shellInit = "export mountPoint=/mnt";
 }