90crypt: call systemd commands only if systemd binaries are there

modules.d/90crypt/crypt-run-generator.sh

@@ -23,6 +23,9 @@ if strstr "$(cryptsetup --help)" "allow-discards"; then
 fi
 
 echo "$luks $dev none $allowdiscards" >> /etc/crypttab
+
+if command -v systemctl >/dev/null; then
     systemctl daemon-reload
     systemctl start cryptsetup.target
+fi
 exit 0