diff --git a/check-snapshot-age b/check-snapshot-age
index 2b679f9..aeadfde 100644
--- a/check-snapshot-age
+++ b/check-snapshot-age
@@ -5,13 +5,16 @@ import re
 import time
 import argparse
 
+# ZFS-Pfad ermitteln
+zfs = subprocess.check_output(["which", "zfs"]).decode().strip()
+
 # Argumente verarbeiten
 parser = argparse.ArgumentParser(description="ZFS Snapshot Übersicht")
 parser.add_argument("--filter", help="Nur bestimmte Datasets anzeigen (Regex möglich, z.B. 'rpool/ROOT')", type=str)
 args = parser.parse_args()
 
 # Snapshots abrufen
-_snapshots = subprocess.check_output("/usr/sbin/zfs list -t snapshot -Hpo name,creation".split())
+_snapshots = subprocess.check_output([zfs, "list", "-t", "snapshot", "-Hpo", "name,creation"])
 
 LABELS = ("frequent", "hourly", "daily", "weekly", "monthly", "yearly", "backup-zfs", "bashclub-zfs")
 RE_LABELSEARCH = re.compile("|".join(LABELS))
@@ -32,10 +35,10 @@ for _datastore, _snapshot, _creation in re.findall(r"^([\w_./-]+)@([\w_.-]+)\t(\
     _datasets[_datastore][_label].append((_snapshot, int(_creation)))
 
 # Ergebnisse anzeigen
-for _datastore in _datasets.keys():
+for _datastore in _datasets:
     print(_datastore)
     print("-" * 40)
-    for _label in _datasets[_datastore].keys():
+    for _label in _datasets[_datastore]:
         _data = _datasets[_datastore][_label]
         _first = time.strftime("%d.%m.%Y %H:%M:%S", time.localtime(_data[0][1]))
         _last = time.strftime("%d.%m.%Y %H:%M:%S", time.localtime(_data[-1][1]))