diff --git a/modules/user-services/mpv.nix b/modules/user-services/mpv.nix
index de856e0..34a686e 100644
--- a/modules/user-services/mpv.nix
+++ b/modules/user-services/mpv.nix
@@ -4,7 +4,7 @@ let
   mpv-service-script = pkgs.writeShellScriptBin "mpv-service" ''
     #!/bin/sh -eu
 
-    SOCKET_PATH="/tmp/mpv-${USER}.sock"
+    SOCKET_PATH="/tmp/mpv-${username}.sock"
 
     rm -f "''${SOCKET_PATH}"