diff --git a/.github/workflows/opam.yml b/.github/workflows/opam.yml
index 2464296..f7282f7 100644
--- a/.github/workflows/opam.yml
+++ b/.github/workflows/opam.yml
@@ -51,7 +51,7 @@ jobs:
       # Cygwin's cmake hangs during compiler detection with libuv1 1.53.0
       - name: Pin Cygwin libuv1
         if: runner.os == 'Windows'
-        run: Start-Process -Wait -NoNewWindow D:\.opam\.cygwin\setup-x86_64.exe '-q -R D:\cygwin -P libuv1=1.52.1-1'
+        run: Start-Process -Wait -NoNewWindow C:\.opam\.cygwin\setup-x86_64.exe '-q -R C:\cygwin -P libuv1=1.52.1-1'
 
       - name: Build project
         run: opam exec -- dune build