env.set('MPI_C_COMPILER', os.path.join(prereq_dir, 'bin', 'mpicc'))
env.set('MPI_CXX_COMPILER', os.path.join(prereq_dir, 'bin', 'mpicxx'))
env.set('MPI_Fortran_COMPILER', os.path.join(prereq_dir, 'bin', 'mpifort'))
env.set('MPI_C_COMPILER', os.path.join(prereq_dir, 'bin', 'mpicc'))
env.set('MPI_CXX_COMPILER', os.path.join(prereq_dir, 'bin', 'mpicxx'))
env.set('MPI_Fortran_COMPILER', os.path.join(prereq_dir, 'bin', 'mpifort'))