diff --git a/.ci.cmake b/.ci.cmake
index 7caba9175..7d2783d0e 100644
--- a/.ci.cmake
+++ b/.ci.cmake
@@ -14,7 +14,9 @@ ctest_start("Experimental")
 #ctest_update()
 message(STATUS "NOTE: CTEST_CONFIGURE_OPTIONS are '${CTEST_CONFIGURE_OPTIONS}'")
 ctest_configure(OPTIONS "${CTEST_CONFIGURE_OPTIONS}")
-ctest_build(TARGET _hl)
+if(NOT "$ENV{CXX}" MATCHES "g\\+\\+")  ## Avoid ICE for header only build in GCC
+  ctest_build(TARGET _hl)
+endif()
 ctest_build(TARGET _dl)
 ctest_build(TARGET _sl)
 set(retval 0)