diff --git a/modules/programs/bash/profile.sh b/modules/programs/bash/profile.sh
index de02214eb11e..0b6f47d76dd8 100644
--- a/modules/programs/bash/profile.sh
+++ b/modules/programs/bash/profile.sh
@@ -93,13 +93,12 @@ if test "$(stat --printf '%u' $NIX_USER_GCROOTS_DIR)" != "$(id -u)"; then
 fi
 
 # Set up a default Nix expression from which to install stuff.
-if test ! -e $HOME/.nix-defexpr -o -L $HOME/.nix-defexpr; then
+if [ ! -e $HOME/.nix-defexpr -o -L $HOME/.nix-defexpr ]; then
     echo "creating $HOME/.nix-defexpr" >&2
     rm -f $HOME/.nix-defexpr
     mkdir $HOME/.nix-defexpr
-    ln -s /etc/nixos/nixpkgs $HOME/.nix-defexpr/nixpkgs_sys
-    if test "$USER" != root; then
-        ln -s /nix/var/nix/gcroots/per-user/root/channels $HOME/.nix-defexpr/channels_root
+    if [ "$USER" != root ]; then
+        ln -s /nix/var/nix/profiles/per-user/root/channels $HOME/.nix-defexpr/channels_root
     fi
 fi