Fix import try

lbmpy/phasefield/nphase_nestler.py

 try:
-    import pyximport
-except ImportError:
-    print("pyximport could not be imported. nphase_nestler can only be used if Cython is installed")
-    raise
+   import pyximport
+   pyximport.install(language_level=3)
+   from lbmpy.phasefield.simplex_projection import simplex_projection_2d  # NOQA
+except:
+    try:
+        from lbmpy.phasefield.simplex_projection import simplex_projection_2d  # NOQA
+    except:
+        raise ImportError("neither pyximport nor binary module available")
 
 import sympy as sp
 
@@ -10,14 +14,11 @@ from lbmpy.creationfunctions import create_lb_update_rule
 from lbmpy.macroscopic_value_kernels import pdf_initialization_assignments
 from lbmpy.phasefield.analytical import chemical_potentials_from_free_energy, force_from_phi_and_mu
 from lbmpy.phasefield.cahn_hilliard_lbm import cahn_hilliard_lb_method
-from lbmpy.phasefield.simplex_projection import simplex_projection_2d  # NOQA
 from lbmpy.stencils import get_stencil
 from pystencils import Assignment, create_data_handling, create_kernel
 from pystencils.fd import Diff, discretize_spatial, expand_diff_full
 from pystencils.fd.derivation import FiniteDifferenceStencilDerivation
 
-pyximport.install(language_level=3)
-
 
 def forth_order_isotropic_discretize(field):
     second_neighbor_stencil = [(i, j)