install -d $(DESTDIR)$(PREFIX)/share/ikiwiki/$$theme; \
for file in $$theme/*; do \
if echo "$$file" | grep -q style.css; then \
- (cat doc/style.css; cat $$theme/base.css 2>/dev/null; cat $$file) >> $(DESTDIR)$(PREFIX)/share/ikiwiki/$$theme/style.css; \
+ (cat doc/style.css; cat $$theme/base.css 2>/dev/null; cat $$file) > $(DESTDIR)$(PREFIX)/share/ikiwiki/$$theme/style.css; \
elif echo "$$file" | grep -q base.css; then \
:; \
elif [ -f "$$file" ]; then \