diff --git a/js_of_ocaml-compiler.opam b/js_of_ocaml-compiler.opam
index 5a7c34558f..487c516067 100644
--- a/js_of_ocaml-compiler.opam
+++ b/js_of_ocaml-compiler.opam
@@ -15,7 +15,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "ppx_expect" {with-test & >= "0.12.0"}
   "cmdliner"
   "ocaml-migrate-parsetree"
diff --git a/js_of_ocaml-lwt.opam b/js_of_ocaml-lwt.opam
index 855291c234..76f9d4ec1b 100644
--- a/js_of_ocaml-lwt.opam
+++ b/js_of_ocaml-lwt.opam
@@ -15,7 +15,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "lwt" {>= "2.4.4"}
   "js_of_ocaml" {>= "3.2"}
   "js_of_ocaml-ppx"
diff --git a/js_of_ocaml-ocamlbuild.opam b/js_of_ocaml-ocamlbuild.opam
index d04ff8e827..fce9f5943b 100644
--- a/js_of_ocaml-ocamlbuild.opam
+++ b/js_of_ocaml-ocamlbuild.opam
@@ -14,6 +14,6 @@ environment like browsers and Node.js
 build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "ocamlbuild"
 ]
diff --git a/js_of_ocaml-ppx.opam b/js_of_ocaml-ppx.opam
index 3719b5cc30..fe50f6aceb 100644
--- a/js_of_ocaml-ppx.opam
+++ b/js_of_ocaml-ppx.opam
@@ -15,7 +15,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "ocaml-migrate-parsetree" {>= "1.4"}
   "ppx_tools_versioned" {>= "5.2.3"}
   "js_of_ocaml" {>= "3.0"}
diff --git a/js_of_ocaml-ppx_deriving_json.opam b/js_of_ocaml-ppx_deriving_json.opam
index 2492761155..a838873411 100644
--- a/js_of_ocaml-ppx_deriving_json.opam
+++ b/js_of_ocaml-ppx_deriving_json.opam
@@ -15,7 +15,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.04.1"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "js_of_ocaml"
   "ocaml-migrate-parsetree"
   "ppxlib" {< "0.9.0"}
diff --git a/js_of_ocaml-toplevel.opam b/js_of_ocaml-toplevel.opam
index b48fe4236f..d3f19d96a9 100644
--- a/js_of_ocaml-toplevel.opam
+++ b/js_of_ocaml-toplevel.opam
@@ -15,7 +15,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "ocamlfind" {>= "1.5.1"}
   "js_of_ocaml-compiler"
   "js_of_ocaml-ppx"
diff --git a/js_of_ocaml-tyxml.opam b/js_of_ocaml-tyxml.opam
index b42ab9c1d2..d13c8b5fec 100644
--- a/js_of_ocaml-tyxml.opam
+++ b/js_of_ocaml-tyxml.opam
@@ -15,12 +15,9 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "tyxml" {>= "4.3"}
   "reactiveData" {>= "0.2"}
   "js_of_ocaml" {>= "3.0"}
   "js_of_ocaml-ppx"
-]
-conflicts: [
-  "js_of_ocaml"             {<"3.0"}
-]
+]
\ No newline at end of file
diff --git a/js_of_ocaml.opam b/js_of_ocaml.opam
index 485d4e8568..79d219e18b 100644
--- a/js_of_ocaml.opam
+++ b/js_of_ocaml.opam
@@ -17,7 +17,7 @@ build: [["dune" "build" "-p" name "-j" jobs]]
 
 depends: [
   "ocaml" {>= "4.02.0"}
-  "dune" {build & >= "1.11.1"}
+  "dune" {>= "1.11.1"}
   "ocaml-migrate-parsetree" {>= "1.4"}
   "ppx_tools_versioned" {>= "5.2.3"}
   "uchar"