diff --git a/src/Makefile b/src/Makefile
index 61a13c6fe594c97d704dc0d1efaf62cc19a658cf..dd65769a321c70e4883df53b2e981f74936ee568 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -9,8 +9,8 @@ override BUILDDIR_NPTM=$(BUILDDIR)/libnptm
 endif
 ifndef LIBNPTM
 # choose one of the two following lines, depending on whether a static or dynamic libnptm is wanted
-override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.a
-#override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.so
+#override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.a
+override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.so
 endif
 DOCSDIR=$(SRCDIR)/../doc
 
diff --git a/src/cluster/Makefile b/src/cluster/Makefile
index 8a117426a230df94df4ebb368d06d7e56ad23b5b..c13c9680436ae9621e5b861ba2b7198138f20a1d 100644
--- a/src/cluster/Makefile
+++ b/src/cluster/Makefile
@@ -12,8 +12,8 @@ override BUILDDIR_NPTM=$(BUILDDIR)/libnptm
 endif
 ifndef LIBNPTM
 # choose one of the two following lines, depending on whether a static or dynamic libnptm is wanted
-override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.a
-#override LIBNPTM=$(BUILDDIR_NPTM)/libnpTm.so
+#override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.a
+override LIBNPTM=$(BUILDDIR_NPTM)/libnptm.so
 endif
 
 include ../make.inc
diff --git a/src/cluster/cluster.cpp b/src/cluster/cluster.cpp
index dacb574119f61fe4c78f4cc9c1a8901d9ec921b4..db3364350918bfe1e3c6f9144606151254e71986 100644
--- a/src/cluster/cluster.cpp
+++ b/src/cluster/cluster.cpp
@@ -32,18 +32,20 @@
 #include "../include/TransitionMatrix.h"
 #endif
 
+#ifdef USE_LAPACK
 #ifndef INCLUDE_LAPACK_CALLS_H_
 #include "lapacke.h"
 #include "../include/lapack_calls.h"
 #endif
+#endif
 
 #ifndef INCLUDE_ALGEBRAIC_H_
 #include "../include/algebraic.h"
 #endif
 
-#ifdef LAPACK_ILP64
-#define USE_LAPACK
-#endif
+//#ifdef LAPACK_ILP64
+//#define USE_LAPACK
+//#endif
 
 using namespace std;
 
diff --git a/src/libnptm/lapack_calls.cpp b/src/libnptm/lapack_calls.cpp
index 43efcce8f7b0d159172f2c14e645bf65324444b5..a13ec0014a618b226f18c677b998224e56fbff86 100644
--- a/src/libnptm/lapack_calls.cpp
+++ b/src/libnptm/lapack_calls.cpp
@@ -6,6 +6,7 @@
 #include "../include/lapack_calls.h"
 #endif
 
+#ifdef USE_LAPACK
 void zinvert(std::complex<double> **mat, lapack_int n, int &jer) {
   jer = 0;
   __complex__ double *arr = new __complex__ double[n * n];
@@ -30,3 +31,4 @@ void zinvert(std::complex<double> **mat, lapack_int n, int &jer) {
   delete[] IPIV;
   delete[] arr;
 }
+#endif
diff --git a/src/make.inc b/src/make.inc
index 35dc57133af4d91ef332f1016c56d23150d0856c..85c0c73b8076689864a0ef4d1719758d302aa578 100644
--- a/src/make.inc
+++ b/src/make.inc
@@ -38,10 +38,48 @@ ifndef HDF5_INCLUDE
 override HDF5_INCLUDE=/usr/include/hdf5/serial
 endif
 
+# define (outside) USE_LAPACK for lapacke support, LAPACK_ILP64 for ilp64 interface, MKL_ILP64 the same if using MKL implementation
+ifdef USE_LAPACK
+ifndef LAPACK_ILP64
+override LAPACK_ILP64=1
+endif
+# define (outside) USE_MKL to use the MKL implementation of lapacke
+ifdef USE_MKL
+ifndef MKL_ILP64
+override MKL_ILP64=1
+endif
+ifndef LAPACK_INCLUDE
+# this is for the MKL implementation
+override LAPACK_INCLUDE=$(MKLROOT)/include
+endif
+ifndef LAPACK_LDFLAGS
+# this is for the MKL implementation
+override LAPACK_LDFLAGS=-L$(MKLROOT)/lib -Wl,--no-as-needed -lmkl_intel_ilp64 -lmkl_gnu_thread -lmkl_core -lgomp -lpthread -lm -ldl
+endif
+# the next else refers to USE_MKL
+else
+ifndef LAPACK_INCLUDE
+# this is for standard "vanilla" lapacke64
+override LAPACK_INCLUDE=/usr/include
+endif
+ifndef LAPACK_LDFLAGS
+# this is for standard "vanilla" lapacke64
+override LAPACK_LDFLAGS=-llapacke64
+endif
+# the next endif is for USE_MKL
+endif
+#the next endif is for USE_LAPACK
+endif
+
 # CXXFLAGS defines the default compilation options for the C++ compiler
 ifndef CXXFLAGS
-override CXXFLAGS=-O3 -ggdb -pg -coverage -DLAPACK_ILP64 -I$(HDF5_INCLUDE)
-#override CXXFLAGS=-O3 -I$(HDF5_INCLUDE)
+override CXXFLAGS=-O3 -ggdb -pg -coverage -I$(HDF5_INCLUDE)
+ifdef USE_LAPACK
+override CXXFLAGS+= -DUSE_LAPACK -DMKL_ILP64 -DLAPACK_ILP64 
+ifdef USE_MKL
+override CXXFLAGS+= -DMKL_ILP64 -I$(MKLROOT)/include
+endif
+endif
 endif
 
 # HDF5_LIB defines the default path to the HDF5 libraries to use
@@ -50,9 +88,11 @@ ifndef CXXLDFLAGS
 ifndef HDF5_LIB
 override HDF5_LIB=/usr/lib/x86_64-linux-gnu/hdf5/serial
 endif
-override CXXLDFLAGS=-L/usr/lib64 -L$(HDF5_LIB) -lhdf5 -llapacke64 $(LDFLAGS)
-#else
-#override CXXLDFLAGS=-L/usr/lib64 -L$(HDF5_LIB) -lhdf5 $(CXXLDFLAGS)
+override CXXLDFLAGS=-L/usr/lib64 -L$(HDF5_LIB) -lhdf5
+ifdef USE_LAPACK
+override CXXLDFLAGS+= $(LAPACK_LDFLAGS)
+endif
+override CXXLDFLAGS+= $(LDFLAGS)
 endif
 
 #SOFLAGS defines the additional flags for the c++ compiler to create a shared object file