diff --git a/.gitignore b/.gitignore
index 21b5cfc05..6a161df64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,5 @@ _$*
 core
 # CVS default ignores end
 .*.swp
+# We generate makefiles by shell script
+Makefile
diff --git a/sys/unix/mkmkfile.sh b/sys/unix/mkmkfile.sh
old mode 100644
new mode 100755
diff --git a/sys/unix/nethack.sh b/sys/unix/nethack.sh
old mode 100644
new mode 100755
diff --git a/sys/unix/setup.sh b/sys/unix/setup.sh
old mode 100644
new mode 100755