diff --git a/mpbackup b/mpbackup
index aba9d47..4e70eb0 100644
--- a/mpbackup
+++ b/mpbackup
@@ -8,8 +8,6 @@ DEFAULT_CONFIG_FILE = Pathname.new('/etc/mpbackup/config.yaml')
 NAME = 'mpbackup'
 VERSION = '0.5.0'
 
-$original_cache_home = ENV['XDG_CACHE_HOME']
-
 def set_restic_vars(config)
   if config['repository-file']
     puts "Reading repository from file #{config['repository-file']} …"
@@ -25,9 +23,9 @@ def set_restic_vars(config)
   else
     password = STDIN.getpass('Please put in your restic password: ')
   end
-  if config['cache-home']
-    puts "Setting XDG_CACHE_HOME to #{config['cache-home']} …"
-    ENV['XDG_CACHE_HOME'] = config['cache-home']
+  if config['cache-dir']
+    puts "Setting RESTIC_CACHE_DIR to #{config['cache-dir']} …"
+    ENV['RESTIC_CACHE_DIR'] = config['cache-dir']
   end
 
   ENV['RESTIC_REPOSITORY'] = repo
@@ -37,11 +35,7 @@ end
 def unset_restic_vars
   ENV.delete('RESTIC_REPOSITORY')
   ENV.delete('RESTIC_PASSWORD')
-  if $original_cache_home
-    ENV['XDG_CACHE_HOME'] = $original_cache_home
-  else
-    ENV.delete('XDG_CACHE_HOME')
-  end
+  ENV.delete('RESTIC_CACHE_DIR')
 end
 
 def error(exit_status, message)