diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 7ad5ccf5f..ac167e748 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -101,7 +101,7 @@ jobs:
         (cd winsup; ./autogen.sh) &&
         cd build &&
         ../configure --prefix=$(realpath $(pwd)/../install) -v &&
-        export MAKEFLAGS=-j$(ncores) &&
+        export MAKEFLAGS=-j$(nproc) &&
         make &&
         make install &&
         (cd */newlib; make info man) &&