diff --git a/.github/workflows/ci2.yml b/.github/workflows/ci2.yml
index d00bfeab6e0..19beb8307ca 100644
--- a/.github/workflows/ci2.yml
+++ b/.github/workflows/ci2.yml
@@ -95,6 +95,7 @@ jobs:
           #LDFLAGS="-Wl,-no-undefined" ./configure --enable-shared --disable-dap --disable-examples --disable-v2 --disable-utilities --disable-testsets
           echo "LD_LIBRARY_PATH=/d/a/_temp/msys64/mingw64/lib" >> $GITHUB_ENV
           echo "PATH=/d/a/_temp/msys64/mingw64/bin:/d/a/modflow6/modflow6/ncc/include:/d/a/modflow6/modflow6/ncf/netcdf-fortran-4.6.0/fortran/.libs:/d/a/modflow6/modflow6/modflow6/bin" >> $GITHUB_ENV
+          sed -i.bak -e "s/\(allow_undefined=\)yes/\1no/" libtool
           echo "grep:"
           grep -nrIl nc_inq_libvers .
           echo "ls -al:"