diff --git a/CMake/variants/variants.dragnet b/CMake/variants/variants.dragnet
index 7f35a61b76e25be7596e23a16b1f4e6e3a3230de..67b60befff1e75ab76175761854bc8da27997e17 100644
--- a/CMake/variants/variants.dragnet
+++ b/CMake/variants/variants.dragnet
@@ -6,6 +6,8 @@ option(USE_MPI       "Use MPI"       ON)
 option(USE_OPENMP    "Use OpenMP"    ON)
 option(USE_CUDA      "Use CUDA"      ON)
 
+set(LOG4CPLUS_ROOT_DIR    /opt/log4cplus-1.1.2)
+set(BLITZ_ROOT_DIR        /opt/blitz-0.10)
 set(CUDA_TOOLKIT_ROOT_DIR /opt/cuda-7.0)
 set(CASACORE_ROOT_DIR     /opt/casacore-2.0.1)
 set(DAL_ROOT_DIR          /opt/lofardal-2.5.0)