.profile: Add GNU aliases if GNU coreutils are found on MacOS

.profile

@@ -251,7 +251,7 @@ if [ -d "$HOME/.dotfiles" ]; then
 fi
 
 # Aliases for common utilities
-if [ "$(uname)" = "Linux" ]; then
+if [ "$(uname)" = "Linux" ] || [ -d "$gnubin" ]; then
 	# Assume we have GNU coreutils
 	lsarguments='-Fh --color=auto --group-directories-first'
 	alias l="ls -l --file-type $lsarguments"
@@ -362,6 +362,7 @@ case "$_baseshell" in
 esac
 
 # Clean up
+unset gnubin
 unset -v _baseshell
 unset -f has