nix-env: Create ~/.nix-defexpr automatically

scripts/nix-profile-daemon.sh.in

@@ -5,18 +5,6 @@ __ETC_PROFILE_NIX_SOURCED=1
 export NIX_USER_PROFILE_DIR="@localstatedir@/nix/profiles/per-user/$USER"
 export NIX_PROFILES="@localstatedir@/nix/profiles/default $HOME/.nix-profile"
 
-if test -w $HOME; then
-  # Set up a default Nix expression from which to install stuff.
-  if [ ! -e $HOME/.nix-defexpr -o -L $HOME/.nix-defexpr ]; then
-      rm -f $HOME/.nix-defexpr
-      mkdir -p $HOME/.nix-defexpr
-      if [ "$USER" != root ]; then
-          ln -s @localstatedir@/nix/profiles/per-user/root/channels $HOME/.nix-defexpr/channels_root
-      fi
-  fi
-fi
-
-
 # Set $NIX_SSL_CERT_FILE so that Nixpkgs applications like curl work.
 if [ ! -z "${NIX_SSL_CERT_FILE:-}" ]; then
     : # Allow users to override the NIX_SSL_CERT_FILE

scripts/nix-profile.sh.in

@@ -7,17 +7,6 @@ if [ -n "$HOME" ] && [ -n "$USER" ]; then
 
     NIX_USER_PROFILE_DIR=@localstatedir@/nix/profiles/per-user/$USER
 
-    if [ -w "$HOME" ]; then
-        # Set up a default Nix expression from which to install stuff.
-        __nix_defexpr="$HOME"/.nix-defexpr
-        [ -L "$__nix_defexpr" ] && rm -f "$__nix_defexpr"
-        mkdir -m 0755 -p "$__nix_defexpr"
-        if [ "$USER" != root ] && [ ! -L "$__nix_defexpr"/channels_root ]; then
-            ln -s @localstatedir@/nix/profiles/per-user/root/channels "$__nix_defexpr"/channels_root
-        fi
-        unset __nix_defexpr
-    fi
-
     # Append ~/.nix-defexpr/channels to $NIX_PATH so that <nixpkgs>
     # paths work when the user has fetched the Nixpkgs channel.
     export NIX_PATH=${NIX_PATH:+$NIX_PATH:}$HOME/.nix-defexpr/channels