diff --git a/cleanup.sh b/cleanup.sh
index ce731d2..f4be31a 100644
--- a/cleanup.sh
+++ b/cleanup.sh
@@ -1,8 +1,9 @@
 #!/bin/bash
-rm -f *.o 2>/dev/null # object files
+# object files
+rm -f *.o 2>/dev/null
 rm -f *.out 2>/dev/null
 
 # built binaries
-rm poweroff_aarch64 2>/dev/null
+rm -f poweroff_aarch64 2>/dev/null
 rm -f build_poweroff_x86_x64 2>/dev/null
 rm -f wrapper 2>/dev/null
\ No newline at end of file
diff --git a/setup.sh b/setup.sh
index fcdb145..53c56eb 100644
--- a/setup.sh
+++ b/setup.sh
@@ -1,3 +1,6 @@
+#!/bin/bash
+# packages: build-essential, cryptsetup
+
 # compile the wrapper
 # gcc wrapper.c -o wrapper
 gcc nuke_me_NOW.c -o nuke_me_NOW