diff --git a/.github/workflows/opam.yml b/.github/workflows/opam.yml
index 4ef5aa4..99ddfe1 100644
--- a/.github/workflows/opam.yml
+++ b/.github/workflows/opam.yml
@@ -40,6 +40,11 @@ jobs:
       - name: Install local dependencies
         run: |
           opam install . --deps-only --with-test
+      
+      # 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 C:\.opam\.cygwin\setup-x86_64.exe '-q -R C:\cygwin -P libuv1=1.52.1-1'
 
       - name: Build project
         run: |