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--- a/src/mk/localdefs
+++ b/src/mk/localdefs
@@ -5,5 +5,5 @@
 LIBICONV=-L/usr/local/lib -liconv
 INCICONV=-I/usr/local/include
 
-LOCALCXXFLAGS = $(INCICONV) $(XAPIANCXXFLAGS)
+LOCALCXXFLAGS = $(INCICONV) $(XAPIANCXXFLAGS) -DRECOLL_PREFIX=\"/usr/local\"