diff --git a/src/Makefile b/src/Makefile
index 4e8195f..4c2646c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,26 +1,25 @@
-CCFLAGS ?= -std=c99 -O3
+CFLAGS ?= -std=c99 -O3
 
 TARGET = pixiewps
 CRYPTO = mbedtls/sha256.c mbedtls/md.c mbedtls/md_wrap.c
 SOURCE = $(TARGET).c random_r.c $(CRYPTO)
 LIBS   = -lpthread
 
-PREFIX ?= $(DESTDIR)/usr
+PREFIX ?= /usr
 BINDIR = $(PREFIX)/bin
 
 all:
-	$(CC) $(CFLAGS) $(CCFLAGS) $(CPPFLAGS) -o $(TARGET) $(SOURCE) $(LIBS) $(LDFLAGS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $(TARGET) $(SOURCE) $(LIBS) $(LDFLAGS)
 
 debug:
-	$(CC) $(CLFAGS) $(CCFLAGS) $(CPPFLAGS) -DDEBUG -o $(TARGET) $(SOURCE) $(LIBS) $(LDFLAGS)
+	$(CC) $(CLFAGS) $(CPPFLAGS) -DDEBUG -o $(TARGET) $(SOURCE) $(LIBS) $(LDFLAGS)
 
 install:
-	rm -f $(BINDIR)/$(TARGET)
 	install -d $(BINDIR)
-	install -m 755 $(TARGET) $(BINDIR)
+	install -m 755 $(TARGET) $(DESTDIR)$(BINDIR)
 
 uninstall:
-	rm -f $(BINDIR)/$(TARGET)
+	rm -f $(DESTDIR)$(BINDIR)/$(TARGET)
 
 clean:
 	rm -f $(TARGET)