diff --git a/.github/ci-config.yml b/.github/ci-config.yml
index 984ea71a3..b63a728ae 100644
--- a/.github/ci-config.yml
+++ b/.github/ci-config.yml
@@ -1,4 +1,4 @@
-cmake_options: -DBOOST_ROOT=${BOOST_ROOT_DIR:-/usr} -DBOOST_INCLUDEDIR=${BOOST_INCLUDE_DIR:-/usr/include/boost169} -DBOOST_LIBRARYDIR=${BOOST_LIB_DIR:-/usr/lib64/boost169} -DENABLE_STATIC_BOOST_LIBS=OFF
+cmake_options: -DBOOST_ROOT=${BOOST_ROOT_DIR} -DBOOST_INCLUDEDIR=${BOOST_INCLUDE_DIR} -DBOOST_LIBRARYDIR=${BOOST_LIB_DIR} -DENABLE_STATIC_BOOST_LIBS=OFF
 dependencies: |
   ecmwf/ecbuild
 dependency_branch: develop