diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 0c22bf1465b..3005fdfe5ea 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -41,6 +41,8 @@ jobs:
         run: |
           D:\opam\bin\opam --version
           "D:\opam\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          "D:\opamroot\.cygwin\root\usr\x86_64-w64-mingw32\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          "D:\opamroot\.cygwin\root\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
       - name: Init opam
         if: steps.cache-opam.outputs.cache-hit != 'true'