diff --git a/Makefile b/Makefile
index 1acfe45..65d40a3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,12 @@
 .POSIX:
 .SUFFIXES:
 
-CC = cc
 VERSION = 1.0
 TARGET = lcc
 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 = lcc.c
 
@@ -24,15 +22,14 @@ dist:
 
 install: $(TARGET)
 	mkdir -p $(DESTDIR)$(BINDIR)
-	mkdir -p $(DESTDIR)$(MANDIR)
 	cp -p $(TARGET) $(DESTDIR)$(BINDIR)/$(TARGET)
 	chmod 755 $(DESTDIR)$(BINDIR)/$(TARGET)
 
 uninstall:
-	$(RM) $(DESTDIR)$(BINDIR)/$(TARGET)
+	rm $(DESTDIR)$(BINDIR)/$(TARGET)
 
 clean:
-	$(RM) $(TARGET)
+	rm $(TARGET)
 
 all: $(TARGET)
 
diff --git a/lcc.h b/lcc.h
index 4613761..98ba167 100644
--- a/lcc.h
+++ b/lcc.h
@@ -51,9 +51,9 @@ language languages[] = {
     {"Vimscript", {".vim"}, NULL, NULL, "\""},
 };
 
-#define IGNORE_DIRS 5
+#define IGNORE_DIRS 8
 /* IGNORE_DIRS must have same length of ignore_dir */
 
-char *ignore_dir[IGNORE_DIRS] = {"stagit", "env", "TerminalChat", "cath-docs", ".d.ts"};
+char *ignore_dir[IGNORE_DIRS] = {"stagit", "env", "ref", "cath-docs", ".d.ts", "coslinux", "Zig", "pdfs"};
 
 #endif