diff --git a/modules/ocaml/init.zsh b/modules/ocaml/init.zsh
index 2e5b71e5..570e1ec0 100644
--- a/modules/ocaml/init.zsh
+++ b/modules/ocaml/init.zsh
@@ -6,10 +6,10 @@
 #
 
 # Return if requirements are not found.
-if (( ! $+commands[opam] )); then
+if [[ ! -f "$HOME/.opam/opam-init/init.zsh" ]]; then
   return 1
 fi
 
 # Initialize OPAM.
-eval "$(opam config env)"
+source "$HOME/.opam/opam-init/init.zsh"