bash: more guix profile stuff

bashrc.d/guix.bash

@@ -1,10 +1,15 @@
 which guix 1>/dev/null
 if [ $? -eq 0 ] ; then
   if [ -d "$HOME/.config/guix/" ] ; then
-    GUIX_PROFILE="$HOME/.config/guix/current"
+    export GUIX_PROFILE="$HOME/.config/guix/current"
+    export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"
     . "$GUIX_PROFILE/etc/profile"
   else
     echo "No current GUIX_PROFILE."
   fi
 fi
-
+if [ -n "$GUIX_ENVIRONMENT" ]; then
+    if [[ $PS1 =~ (.*)"\\$" ]]; then
+        PS1="${BASH_REMATCH[1]} [env]\\\$ "
+    fi
+fi