--- mongrel2-v1.11.0.orig/tools/m2sh/Makefile	2015-12-31 10:25:18.000000000 +0100
+++ mongrel2-v1.11.0/tools/m2sh/Makefile	2016-04-25 20:14:36.744476585 +0200
@@ -1,7 +1,8 @@
-CFLAGS=-DNDEBUG -DNO_LINENOS -pthread -g -I../../src -Isrc -Wall $(OPTFLAGS)
+CFLAGS?=
+CFLAGS+=-DNDEBUG -DNO_LINENOS -pthread -g -I../../src -Isrc -Wall $(OPTFLAGS)
 LIBS=-lzmq -lsqlite3 ../../build/libm2.a $(OPTLIBS)
 
-PREFIX?=/usr/local
+PREFIX?=/usr
 SOURCES=$(wildcard src/*.c src/**/*.c)
 OBJECTS=$(patsubst %.c,%.o,${SOURCES})
 TEST_SRC=$(wildcard tests/*.c)
@@ -9,7 +10,7 @@ TESTS=$(patsubst %.c,%,${TEST_SRC})
 LIB_SRC=$(filter-out src/m2sh.c,${SOURCES})
 LIB_OBJ=$(filter-out src/m2sh.o,${OBJECTS})
 
-all: ../lemon/lemon tests build/m2sh
+all: ../lemon/lemon build/m2sh
 
 dev: CFLAGS=-g -Wall -Wextra -Isrc -I../../src $(OPTFLAGS)
 dev: all
@@ -27,7 +28,7 @@ build/m2sh: ../lemon/lemon ../../build/l
 	$(CC) $(CFLAGS) -o build/m2sh ${OBJECTS} ../../build/libm2.a $(LIBS)
 
 ../lemon/lemon: ../lemon/lemon.c
-	$(CC) -O2 ../lemon/lemon.c -o ../lemon/lemon
+	$(CC) $(CFLAGS) ../lemon/lemon.c -o ../lemon/lemon
 
 tests: build/libm2sh.a ${TESTS}
 	sh ./tests/runtests.sh