diff --git a/scripts/docker/base-box/Dockerfile b/scripts/docker/base-box/Dockerfile
index cf49afebd5..e772f0c8ff 100644
--- a/scripts/docker/base-box/Dockerfile
+++ b/scripts/docker/base-box/Dockerfile
@@ -27,4 +27,4 @@ WORKDIR /home/$user
 ENV OPAMYES=true OPAMVERBOSE=0 OPAMJOBS=4
 
 RUN \
-	opam init --disable-sandboxing --switch=ocaml-base-compiler.5.1.0
+	opam init --disable-sandboxing --compiler=ocaml-base-compiler.5.1.0