fix: add package build and fix disko

disko

@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
 set -euo pipefail
-set -x
 
 readonly libexec_dir="${0%/*}"
 
+# a file with the disko config
+declare disko_config
+
 # mount was chosen as the default mode because it's less destructive
 mode=mount
 nix_args=()
@@ -30,6 +32,11 @@ abort() {
 
 ## Main ##
 
+[[ $# -eq 0 ]] && {
+  showUsage
+  exit 1
+}
+
 while [[ $# -gt 0 ]]; do
   case "$1" in
     -m | --mode)
@@ -46,10 +53,11 @@ while [[ $# -gt 0 ]]; do
       exit 0
       ;;
     *)
-      if [ -z ${disko_config+x} ] && [ -e $1 ]; then
+      if [ -z ${disko_config+x} ] && [ -e "$1" ]; then
         disko_config=$1
       else
         showUsage
+        exit 1
       fi
       ;;
   esac