diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 166ac33..501332f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -100,9 +100,12 @@ jobs:
         uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext-flags: --with-test
-          opam-local-packages: |
-            js/melange-decoders.opam
+
+      - working-directory: js
+        run: |
+          opam pin -y -n melange-jest git+ssh://git@github.com/melange-community/melange-jest.git
+          opam pin -y -n melange-fetch git+ssh://git@github.com/melange-community/melange-fetch.git
+          opam pin -y -n melange-webapi git+ssh://git@github.com/melange-community/melange-webapi.git
 
       - run: opam install decoders-melange.opam --with-test
         working-directory: js
diff --git a/js/dune-project b/js/dune-project
index 7685861..169a9b8 100644
--- a/js/dune-project
+++ b/js/dune-project
@@ -11,4 +11,6 @@
  (depends
   (ocaml (>= 4.13.0))
   (odoc :with-doc)
+  (melange-fetch (= "dev"))
+  (melange-webapi (= "dev"))
   (melange-jest :with-test)))
diff --git a/js/melange-decoders.opam b/js/melange-decoders.opam
index 77b5453..3fa491a 100644
--- a/js/melange-decoders.opam
+++ b/js/melange-decoders.opam
@@ -7,6 +7,8 @@ depends: [
   "dune" {>= "3.8"}
   "ocaml" {>= "4.13.0"}
   "odoc" {with-doc}
+  "melange-fetch" {= "dev"}
+  "melange-webapi" {= "dev"}
   "melange-jest" {with-test}
 ]
 build: [