diff --git a/Makefile b/Makefile
index 3086d370..ad8cb025 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ build:
 	@echo     source quantum_package.rc
 	@echo   -----------------------------------------------
 else
-build:
+build: EZFIO curl m4 irpf90 emsl 
 	$(MAKE) -C src
 	$(MAKE) -C ocaml
 endif
diff --git a/src/Dets/save_for_qmcchem.irp.f b/src/Dets/save_for_qmcchem.irp.f
index e72a8d8f..363e0ba2 100644
--- a/src/Dets/save_for_qmcchem.irp.f
+++ b/src/Dets/save_for_qmcchem.irp.f
@@ -41,7 +41,7 @@ subroutine save_dets_qmcchem
    write(31,'(A)') 'a'
  enddo
  close(31)
- call system('gzip '//trim(ezfio_filename)//'/mo_basis/mo_classif')
+ call system('gzip -f '//trim(ezfio_filename)//'/mo_basis/mo_classif')
 end
 
 program save_for_qmc
diff --git a/src/Makefile b/src/Makefile
index a8be9a93..307197fe 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -24,3 +24,4 @@ executables: $(ALL_MODULES)
 # Dummy rule to enable to force recompilation
 FORCE:
 
+veryclean: all_clean