diff --git a/dotfiles-old/bin/displaym b/dotfiles-old/bin/displaym
index dd5f81b..bd28248 100755
--- a/dotfiles-old/bin/displaym
+++ b/dotfiles-old/bin/displaym
@@ -1,20 +1,17 @@
 #!/bin/sh
-
 set -ex
 
 usage() {
+	set +x
 	printf "\
 Usage:
-	%s start [window manager]
-" >>/dev/stderr
+	%s start [window manager]\n" "$argv0" >>/dev/stderr
 	exit 1
 }
 
 [ -n "$1" ] || usage
-[ -z "$HOME" ] \
-	&& printf "No \$HOME environment variable found. This is very bad and an issue that is not caused by this script.\n" 1>&2 \
-	&& exit 1 \
-	|| true
+
+# assumption: $HOME contains the path to the user's home directory
 
 DISPLAYM_CONFIG="$HOME/.config/displaym"; export DISPLAYM_CONFIG
 [ -d "$DISPLAYM_CONFIG" ] || mkdir -p "$DISPLAYM_CONFIG"