confirm all questions opam init may have

build/opam-ci.sh

@@ -8,7 +8,7 @@ export OPAMJOBS=16
 export OPAM_EDITOR="$(which false)"
 
 # Make sure we got a good OPAM
-test -d "$OPAMROOT" || (mkdir "$OPAMROOT" && opam init -n)
+test -d "$OPAMROOT" || (mkdir "$OPAMROOT" && opam init --no-setup -y)
 eval `opam conf env`
 test -d "$OPAMROOT/repo/coq-extra-dev" || opam repo add coq-extra-dev https://coq.inria.fr/opam/extra-dev -p 5
 test -d "$OPAMROOT/repo/coq-core-dev" || opam repo add coq-core-dev https://coq.inria.fr/opam/core-dev -p 5