diff --git a/nixos/modules/services/audio/mpd.nix b/nixos/modules/services/audio/mpd.nix
index 2f5e8c1a2bcd..b57ec9b9f7aa 100644
--- a/nixos/modules/services/audio/mpd.nix
+++ b/nixos/modules/services/audio/mpd.nix
@@ -27,29 +27,29 @@ let
   mpdConf = pkgs.writeTextFile {
     name = "mpd.conf";
     text = ''
-    # This file was automatically generated by NixOS. Edit mpd's configuration
-    # via NixOS' configuration.nix, as this file will be rewritten upon mpd's
-    # restart.
+      # This file was automatically generated by NixOS. Edit mpd's configuration
+      # via NixOS' configuration.nix, as this file will be rewritten upon mpd's
+      # restart.
 
-    music_directory     "${cfg.music_directory}"
-    playlist_directory  "${cfg.playlist_directory}"
-    db_file             "${cfg.db_file}"
-    state_file          "${cfg.dataDir}/state"
-    sticker_file        "${cfg.dataDir}/sticker.sql"
+      music_directory     "${cfg.music_directory}"
+      playlist_directory  "${cfg.playlist_directory}"
+      db_file             "${cfg.db_file}"
+      state_file          "${cfg.dataDir}/state"
+      sticker_file        "${cfg.dataDir}/sticker.sql"
 
-    bind_to_address "${cfg.bind_to_address}"
-    port "${toString cfg.port}"
-    ${lib.optionalString (cfg.fluidsynth) ''
-      decoder {
-              plugin "fluidsynth"
-              soundfont "${pkgs.soundfont-fluid}/share/soundfonts/FluidR3_GM2-2.sf2"
-      }
-    ''}
+      bind_to_address "${cfg.bind_to_address}"
+      port "${toString cfg.port}"
+      ${lib.optionalString (cfg.fluidsynth) ''
+        decoder {
+                plugin "fluidsynth"
+                soundfont "${pkgs.soundfont-fluid}/share/soundfonts/FluidR3_GM2-2.sf2"
+        }
+      ''}
 
-    ${lib.optionalString (cfg.credentials != [ ]) (credentialsPlaceholder cfg.credentials)}
+      ${lib.optionalString (cfg.credentials != [ ]) (credentialsPlaceholder cfg.credentials)}
 
-    ${cfg.extraConfig}
-  '';
+      ${cfg.extraConfig}
+    '';
     derivationArgs = {
       expectScript = ''
         spawn ${lib.getExe pkgs.buildPackages.mpd} --no-daemon "$env(out)"