diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6fd1b750..868e255d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -174,7 +174,7 @@ jobs:
         if: matrix.os == 'windows-latest'
         shell: bash
         run: |
-          cp $GITHUB_WORKSPACE/binaryen/bin/wasm-{merge,opt}.exe _opam\bin
+          cp $GITHUB_WORKSPACE/binaryen/bin/wasm-{merge,opt}.exe _opam/bin
 
       - name: Binaryen DEBUG
         shell: bash