diff --git a/.github/workflows/build-wasm_of_ocaml.yml b/.github/workflows/build-wasm_of_ocaml.yml
index c0e8ae99..0122e142 100644
--- a/.github/workflows/build-wasm_of_ocaml.yml
+++ b/.github/workflows/build-wasm_of_ocaml.yml
@@ -109,11 +109,11 @@ jobs:
           opam-depext: true
           opam-depext-flags: --with-test
 
-      - name: Install packages
+      - name: Install packages (Ubuntu)
         if: matrix.os == 'ubuntu-latest' && steps.cache-ocaml.outputs.cache-hit
         run: sudo apt-get install bubblewrap
 
-      - name: Install packages
+      - name: Install packages (MacOs)
         if: matrix.os == 'macos-latest' && steps.cache-ocaml.outputs.cache-hit
         # for graphics
         run: brew install xquartz
@@ -163,7 +163,7 @@ jobs:
       - name: Pin wasm_of_ocaml
         working-directory: ./wasm_of_ocaml
         run: |
-           for i in *.opam; do opam pin add -n `basename $i .opam`.`< VERSION` .; done
+           cat VERSION | xargs opam pin add -n . --with-version 
         shell: bash
 
       - name: Install opam file parser