Fix zprofile error

dotfiles/zsh/zprofile

@@ -19,8 +19,10 @@ if hash pyenv 2>/dev/null; then
   eval "$(pyenv init -)"
 fi
 
-# Local bin 
 export PATH=$HOME/bin:/usr/local/bin:$PATH
 
 test -r /home/vm/.opam/opam-init/init.sh && . /home/vm/.opam/opam-init/init.sh > /dev/null 2> /dev/null || true
-. "$HOME/.cargo/env"
+
+if [ -f "$HOME/.cargo/env" ]; then
+	. "$HOME/.cargo/env"
+fi