Index: slepc/makefile
===================================================================
--- slepc.orig/makefile	2020-10-12 11:36:11.219511357 +0800
+++ slepc/makefile	2020-10-12 11:36:11.215511361 +0800
@@ -144,7 +144,7 @@
 allclean:
 	-@${OMAKE} -f gmakefile clean
 
-clean:: allclean
+clean: allclean
 
 reconfigure:
 	@unset MAKEFLAGS && ${PYTHON} ${PETSC_ARCH}/lib/slepc/conf/reconfigure-${PETSC_ARCH}.py
