diff --git a/modules/services/tmptsync.nix b/modules/services/tmptsync.nix
index 5c3f4fb..864bb1d 100644
--- a/modules/services/tmptsync.nix
+++ b/modules/services/tmptsync.nix
@@ -10,11 +10,13 @@ in
         after = [ "local-fs.target" "sysinit.target" ];
         unitConfig.DefaultDependencies = false;
 
+        environment.FILE = dir;
         script = "${../../scripts/tmptsync.sh} load";
         wantedBy = [ "basic.target" ];
       };
 
       tmptsync-save = {
+        environment.FILE = dir;
         script = "${../../scripts/tmptsync.sh} load";
         wantedBy = [ "basic.target" ];
       };
diff --git a/scripts/tmptsync.sh b/scripts/tmptsync.sh
index e0f955a..9d5aca7 100755
--- a/scripts/tmptsync.sh
+++ b/scripts/tmptsync.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/bin/sh
 #
 # Super simple script that saves clock to file and reads from it later
 # Something like fake-hwclock from debian