diff -u audio/exaile-devel/Makefile.orig auido/exaile-devel/Makefile
--- audio/exaile-devel/Makefile.orig	2009-06-12 04:26:42.000000000 -0400
+++ audio/exaile-devel/Makefile	2009-06-12 23:22:28.472815120 -0400
@@ -68,8 +68,8 @@
 .endif
 
 post-patch:
-	@${REINPLACE_CMD} -e 's|LIBDIR|LIBINSTALLDIR|g' \
-		${WRKSRC}/Makefile
+	@${REINPLACE_CMD} -e 's|PREFIX =|PREFIX \?=|;s|LIBDIR =|LIBDIR \?=|' \
+		-e 's|LIBDIR|LIBINSTALLDIR|g' ${WRKSRC}/Makefile
 .if defined(WITHOUT_NLS)
 	@${REINPLACE_CMD} -e 's|exaile\.mo|SKIP_NLS_HACK|' ${WRKSRC}/Makefile
 .endif