diff -Naur a/Makefile b/Makefile
--- a/Makefile	2019-05-19 16:36:31.000000000 +0300
+++ b/Makefile	2019-07-24 18:12:29.444896030 +0300
@@ -1,8 +1,8 @@
 PROG = uksmd
 OBJS = uksmd.o
-PREFIX ?= /usr/local
-CFLAGS = -O3 -Wall -Wextra -pedantic -pipe -fstack-protector-strong -fno-plt
-LDFLAGS = -lprocps
+PREFIX ?= /usr
+CFLAGS += -Wextra -pedantic -fstack-protector-strong -fno-plt
+LDFLAGS += -lprocps
 
 all: build