diff --git a/contrib/src/sidplay2/rules.mak b/contrib/src/sidplay2/rules.mak
index bc69455ac5..7b8b2607d9 100644
--- a/contrib/src/sidplay2/rules.mak
+++ b/contrib/src/sidplay2/rules.mak
@@ -22,6 +22,11 @@ sidplay-libs: sidplay-libs-$(SID_VERSION).tar.gz .sum-sidplay2
 	$(MOVE)
 
 .sidplay2: sidplay-libs
+	for d in . libsidplay builders resid builders/resid-builder \
+			builders/hardsid-builder libsidutils ; \
+	do \
+		(cd $</$$d && rm -rf aclocal.m4 Makefile.in configure) || exit $$? ; \
+	done
 	for d in . libsidplay resid builders/resid-builder \
 			builders/hardsid-builder libsidutils ; \
 	do \