diff --git a/Makefile b/Makefile
index 039823f..a72b365 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,14 @@
 .POSIX:
 .SUFFIXES:
 
-CC = cc
 VERSION = 1.0
 TARGET = nsh
 PREFIX ?= /usr/local
 BINDIR = $(PREFIX)/bin
 
-# Flags
-CFLAGS = -O3 -march=native -mtune=native -pipe -s -std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600
+CFLAGS = -O3 -march=native -mtune=native -pipe -s -std=c99 -pedantic -Wall
 
-SRC = $(TARGET).c
+SRC = nsh.c
 
 $(TARGET): $(SRC)
 	$(CC) $(SRC) -o $@ $(CFLAGS)
@@ -28,10 +26,10 @@ install: $(TARGET)
 	chmod 755 $(DESTDIR)$(BINDIR)/$(TARGET)
 
 uninstall:
-	$(RM) $(DESTDIR)$(BINDIR)/$(TARGET)
+	rm $(DESTDIR)$(BINDIR)/$(TARGET)
 
 clean:
-	$(RM) $(TARGET)
+	rm $(TARGET)
 
 all: $(TARGET)