diff --git a/packages/base-effects/base-effects.base/opam b/packages/base-effects/base-effects.base/opam
index 449f8cd7321..22ae7da5d1a 100644
--- a/packages/base-effects/base-effects.base/opam
+++ b/packages/base-effects/base-effects.base/opam
@@ -4,10 +4,5 @@ description: """
 Effects-based variant distributed with the Multicore OCaml compiler"
 """
 depends: [
- "ocaml" {>= "4.12.0"}
- "ocaml-variants" {
-    = "4.12.0+domains+effects"
-   | = "5.1.1+effect-syntax"
- }
- "base-domains"
+ "ocaml-variants" {= "4.12.0+domains+effects" | = "5.1.1+effect-syntax"} | "ocaml" {>= "5.3.0"}
 ]
diff --git a/packages/ocaml-variants/ocaml-variants.5.3.0+trunk/opam b/packages/ocaml-variants/ocaml-variants.5.3.0+trunk/opam
index 67810366708..4a6f64ca2d1 100644
--- a/packages/ocaml-variants/ocaml-variants.5.3.0+trunk/opam
+++ b/packages/ocaml-variants/ocaml-variants.5.3.0+trunk/opam
@@ -26,6 +26,7 @@ depends: [
   "base-threads" {post}
   "base-domains" {post}
   "base-nnp" {post}
+  "base-effects" {post}
 
   "ocaml-beta" {opam-version < "2.1.0"}
 
diff --git a/packages/ocaml-variants/ocaml-variants.5.4.0+trunk/opam b/packages/ocaml-variants/ocaml-variants.5.4.0+trunk/opam
index b813d202742..f9d35d2d8df 100644
--- a/packages/ocaml-variants/ocaml-variants.5.4.0+trunk/opam
+++ b/packages/ocaml-variants/ocaml-variants.5.4.0+trunk/opam
@@ -26,6 +26,7 @@ depends: [
   "base-threads" {post}
   "base-domains" {post}
   "base-nnp" {post}
+  "base-effects" {post}
 
   "ocaml-beta" {opam-version < "2.1.0"}