diff --git a/etc/ocaml.rc b/etc/ocaml.rc
index fb58ed39..dd1bc127 100644
--- a/etc/ocaml.rc
+++ b/etc/ocaml.rc
@@ -2,9 +2,9 @@ if [[ -z $OPAMROOT ]]
 then
 
   # Comment these lines if you have a system-wide OCaml installation
-  export OPAMROOT=${OPAMROOT:-${QP_ROOT}/external/opam}
-  source ${OPAMROOT}/opam-init/init.sh > /dev/null 2> /dev/null || true
+  export OPAMROOT=${QP_ROOT}/external/opam
 
 fi
+source ${OPAMROOT}/opam-init/init.sh > /dev/null 2> /dev/null || true