diff --git a/Makefile b/Makefile
index eca49d87..4bf8cae5 100644
--- a/Makefile
+++ b/Makefile
@@ -12,15 +12,15 @@ kryld: precd based
 libd:
 	(if test ! -d lib ; then mkdir lib; fi)
 based:
-	(cd base; $(MAKE) lib)
+	cd base && $(MAKE) lib
 precd:
-	(cd prec; $(MAKE) lib )
+	cd prec && $(MAKE) lib
 kryld:
-	(cd krylov; $(MAKE) lib)
+	cd krylov && $(MAKE) lib
 utild:
-	(cd util; $(MAKE) lib )
+	cd util&& $(MAKE) lib 
 
-install:
+install: all
 	(./mkdir.sh  $(INSTALL_DIR) &&\
 	   $(INSTALL_DATA) Make.inc  $(INSTALL_DIR))
 	(./mkdir.sh  $(INSTALL_LIBDIR) &&\
diff --git a/base/Makefile b/base/Makefile
index d058f845..8e6f6b37 100644
--- a/base/Makefile
+++ b/base/Makefile
@@ -11,17 +11,17 @@ lib: mods sr cm in pb tl
 sr cm in pb tl: mods
 
 mods:
-	(cd modules; $(MAKE) lib LIBNAME=$(BASELIBNAME) F90="$(MPF90)" F90COPT="$(F90COPT) $(MPI_OPT)")
+	cd modules && $(MAKE) lib LIBNAME=$(BASELIBNAME) F90="$(MPF90)" F90COPT="$(F90COPT) $(MPI_OPT)"
 sr:
-	(cd serial; $(MAKE) lib LIBNAME=$(BASELIBNAME))
+	cd serial && $(MAKE) lib LIBNAME=$(BASELIBNAME)
 cm:
-	(cd comm; $(MAKE) lib LIBNAME=$(BASELIBNAME))
+	cd comm && $(MAKE) lib LIBNAME=$(BASELIBNAME)
 in:
-	(cd internals; $(MAKE) lib LIBNAME=$(BASELIBNAME))
+	cd internals && $(MAKE) lib LIBNAME=$(BASELIBNAME)
 pb:
-	(cd psblas; $(MAKE) lib LIBNAME=$(BASELIBNAME))
+	cd psblas && $(MAKE) lib LIBNAME=$(BASELIBNAME)
 tl:
-	(cd tools; $(MAKE) lib LIBNAME=$(BASELIBNAME))
+	cd tools && $(MAKE) lib LIBNAME=$(BASELIBNAME)
 
 clean: 
 	(cd modules; $(MAKE) clean)
diff --git a/base/modules/Makefile b/base/modules/Makefile
index c5e183fd..757df638 100644
--- a/base/modules/Makefile
+++ b/base/modules/Makefile
@@ -40,7 +40,7 @@ CINCLUDES=-I.
 FINCLUDES=$(FMFLAG)$(LIBDIR) $(FMFLAG). $(FIFLAG).
 
 
-lib:  penvmod  $(UTIL_MODS)  $(OBJS)  $(LIBDIR)/$(LIBNAME) 
+lib:  psb_penv_mod.o  $(UTIL_MODS)  $(OBJS)  $(LIBDIR)/$(LIBNAME) 
 	/bin/cp -p $(CPUPDFLAG) $(LIBMOD) $(LIBDIR)
 	/bin/cp -p $(CPUPDFLAG) *$(.mod) $(LIBDIR)
 
@@ -54,6 +54,7 @@ psb_realloc_mod.o:  psb_error_mod.o
 $(UTILS_MODS): $(BASIC_MODS)
 
 
+psi_comm_buffers_mod.o: psb_const_mod.o
 psi_penv_mod.o: psi_comm_buffers_mod.o 
 psi_bcast_mod.o psi_reduce_mod.o psi_p2p_mod.o: psi_penv_mod.o	
 psb_penv_mod.o: psi_bcast_mod.o psi_reduce_mod.o psi_p2p_mod.o 
@@ -64,7 +65,7 @@ psb_s_base_mat_mod.o: psb_s_base_vect_mod.o
 psb_d_base_mat_mod.o: psb_d_base_vect_mod.o
 psb_c_base_mat_mod.o: psb_c_base_vect_mod.o
 psb_z_base_mat_mod.o: psb_z_base_vect_mod.o
-psb_c_base_vect_mod.o psb_s_base_vect_mod.o psb_d_base_vect_mod.o psb_z_base_vect_mod.o: psi_serial_mod.o
+psb_c_base_vect_mod.o psb_s_base_vect_mod.o psb_d_base_vect_mod.o psb_z_base_vect_mod.o: psi_serial_mod.o psb_realloc_mod.o
 psb_s_mat_mod.o: psb_s_base_mat_mod.o psb_s_csr_mat_mod.o psb_s_csc_mat_mod.o psb_s_vect_mod.o
 psb_d_mat_mod.o: psb_d_base_mat_mod.o psb_d_csr_mat_mod.o psb_d_csc_mat_mod.o psb_d_vect_mod.o
 psb_c_mat_mod.o: psb_c_base_mat_mod.o psb_c_csr_mat_mod.o psb_c_csc_mat_mod.o psb_c_vect_mod.o
@@ -88,12 +89,13 @@ psb_desc_type.o: psb_penv_mod.o psb_realloc_mod.o\
 	  psb_hash_mod.o psb_hash_map_mod.o psb_list_map_mod.o \
 	  psb_repl_map_mod.o psb_gen_block_map_mod.o psb_desc_const_mod.o\
 	  psb_indx_map_mod.o 
-psb_indx_map_mod.o: psb_desc_const_mod.o
+psb_indx_map_mod.o: psb_desc_const_mod.o psb_error_mod.o psb_penv_mod.o
 psb_hash_map_mod.o psb_list_map_mod.o psb_repl_map_mod.o psb_gen_block_map_mod.o:\
     psb_indx_map_mod.o psb_desc_const_mod.o  \
     psb_sort_mod.o psb_penv_mod.o 
 psb_glist_map_mod.o: psb_list_map_mod.o
 psb_hash_map_mod.o: psb_hash_mod.o psb_sort_mod.o
+psb_hash_mod.o: psb_realloc_mod.o psb_const_mod.o
 psb_linmap_mod.o: psb_s_linmap_mod.o psb_d_linmap_mod.o psb_c_linmap_mod.o psb_z_linmap_mod.o 
 psb_s_linmap_mod.o: psb_linmap_type_mod.o psb_mat_mod.o psb_s_vect_mod.o
 psb_d_linmap_mod.o: psb_linmap_type_mod.o psb_mat_mod.o psb_d_vect_mod.o
@@ -131,8 +133,8 @@ psb_z_comm_mod.o: psb_z_vect_mod.o psb_desc_type.o psb_mat_mod.o
 
 psb_base_mod.o: $(MODULES)
 
-penvmod: $(BASIC_MODS)
-	($(MAKE) psb_penv_mod.o F90COPT="$(F90COPT) $(EXTRA_OPT)")
+psb_penv_mod.o: $(BASIC_MODS) psb_penv_mod.F90
+	$(F90) -c psb_penv_mod.F90  $(FINCLUDES) $(FDEFINES) $(F90COPT) $(EXTRA_OPT)
 
 
 
diff --git a/base/serial/Makefile b/base/serial/Makefile
index 1222ba7e..3dce39fa 100644
--- a/base/serial/Makefile
+++ b/base/serial/Makefile
@@ -23,12 +23,12 @@ lib1:	$(FOBJS)
 
 
 auxd: 
-	(cd aux; $(MAKE) lib)
+	cd aux && $(MAKE) lib
 
 f77d:
-	(cd f77; $(MAKE) lib)
+	cd f77 && $(MAKE) lib
 impld:
-	(cd impl; $(MAKE) lib)
+	cd impl && $(MAKE) lib
 
 clean:
 	/bin/rm -f $(FOBJS) *$(.mod)
diff --git a/prec/Makefile b/prec/Makefile
index 6f985b5b..39fb4983 100644
--- a/prec/Makefile
+++ b/prec/Makefile
@@ -44,10 +44,10 @@ psb_s_prec_type.o: psb_s_base_prec_mod.o
 psb_d_prec_type.o: psb_d_base_prec_mod.o
 psb_c_prec_type.o: psb_c_base_prec_mod.o
 psb_z_prec_type.o: psb_z_base_prec_mod.o
-psb_s_prec_mod.o:  psb_s_prec_type.o
-psb_d_prec_mod.o:  psb_d_prec_type.o
-psb_c_prec_mod.o:  psb_c_prec_type.o
-psb_z_prec_mod.o:  psb_z_prec_type.o
+psb_s_prec_mod.o:  psb_prec_type.o
+psb_d_prec_mod.o:  psb_prec_type.o
+psb_c_prec_mod.o:  psb_prec_type.o
+psb_z_prec_mod.o:  psb_prec_type.o
 psb_prec_type.o: psb_s_prec_type.o psb_d_prec_type.o psb_c_prec_type.o psb_z_prec_type.o
 psb_prec_mod.o: psb_s_prec_mod.o psb_d_prec_mod.o psb_c_prec_mod.o psb_z_prec_mod.o 
 psb_s_bjacprec.o psb_s_diagprec.o psb_s_nullprec.o: psb_prec_mod.o psb_s_base_prec_mod.o 
diff --git a/util/Makefile b/util/Makefile
index 55ff556c..de877412 100644
--- a/util/Makefile
+++ b/util/Makefile
@@ -24,12 +24,10 @@ LIBNAME=$(UTILLIBNAME)
 FINCLUDES=$(FMFLAG)$(LIBDIR) $(FMFLAG).
 
 
-lib:  $(LIBDIR)/$(LIBNAME) $(LIBDIR)/$(LIBMOD)
+lib:  $(LIBDIR)/$(LIBNAME) 
 
 $(LIBDIR)/$(LIBNAME): $(HERE)/$(LIBNAME)
 	/bin/cp -p $(CPUPDFLAG) $(HERE)/$(LIBNAME) $(LIBDIR)
-
-$(LIBDIR)/$(LIBMOD): $(LIBMOD)
 	/bin/cp -p $(CPUPDFLAG) $(LIBMOD) $(LOCAL_MODS) $(LIBDIR)
 
 $(HERE)/$(LIBNAME): $(OBJS)