--- ./Makefile.orig	2021-01-24 11:14:31.214234196 +0100
+++ ./Makefile	2021-01-24 11:14:43.266238260 +0100
@@ -88,8 +88,7 @@
 	    (cd $${dir} && $(MAKE) $(DODEPENDOPT) distclean) || exit 1; \
 	  done
 	-rm -rf autom4te.cache config.status config.log conf*.file conf*.dir *.dSYM depcheck* libtool \
-Makedirlist libint2.pc include/libint2
-	test -f libint2.pc.in || rm -rf include/libint2
+Makedirlist libint2.pc
 
 targetclean::
 	for dir in $(SUBDIRS); \