diff --git a/configuration.nix b/configuration.nix
index 2762ee4..c159080 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -227,17 +227,17 @@ in
 		"text/plain" = "emacs.desktop";
 
 		# Audio
-		"audio/mpeg"=mpv.desktop
-		"audio/x-mp3"=mpv.desktop
-		"audio/x-wav"=mpv.desktop
+		"audio/mpeg" = mpv.desktop;
+		"audio/x-mp3" = mpv.desktop;
+		"audio/x-wav" = mpv.desktop;
 		
 		# Video
-		"video/mp4"=mpv.desktop
-		"video/x-matroska"=mpv.desktop
-		"video/x-msvideo"=mpv.desktop
-		"video/x-flv"=mpv.desktop
-		"video/x-mpeg"=mpv.desktop
-		"video/x-ms-wmv"=mpv.desktop
+		"video/mp4" = mpv.desktop;
+		"video/x-matroska" = mpv.desktop;
+		"video/x-msvideo" = mpv.desktop;
+		"video/x-flv" = mpv.desktop;
+		"video/x-mpeg" = mpv.desktop;
+		"video/x-ms-wmv" = mpv.desktop;
       	   };
 	};
 
diff --git a/nixos-switch.log b/nixos-switch.log
index a68486e..5e6ff05 100644
--- a/nixos-switch.log
+++ b/nixos-switch.log
@@ -19,14 +19,14 @@ error:
 
        (stack trace truncated; use '--show-trace' to show the full trace)
 
-       error: syntax error, unexpected '=', expecting ';'
+       error: undefined variable 'mpv'
 
-       at /etc/nixos/configuration.nix:231:16:
+       at /etc/nixos/configuration.nix:230:18:
 
-          230|           "audio/mpeg"=mpv.desktop
-          231|                 "audio/x-mp3"=mpv.desktop
-             |                ^
-          232|                "audio/x-wav"=mpv.desktop
+          229|              # Audio
+          230|          "audio/mpeg" = mpv.desktop;
+             |                  ^
+          231|            "audio/x-mp3" = mpv.desktop;
 building Nix...
 error:
        … while evaluating the attribute 'config'
@@ -49,14 +49,14 @@ error:
 
        (stack trace truncated; use '--show-trace' to show the full trace)
 
-       error: syntax error, unexpected '=', expecting ';'
+       error: undefined variable 'mpv'
 
-       at /etc/nixos/configuration.nix:231:16:
+       at /etc/nixos/configuration.nix:230:18:
 
-          230|           "audio/mpeg"=mpv.desktop
-          231|                 "audio/x-mp3"=mpv.desktop
-             |                ^
-          232|                "audio/x-wav"=mpv.desktop
+          229|              # Audio
+          230|          "audio/mpeg" = mpv.desktop;
+             |                  ^
+          231|            "audio/x-mp3" = mpv.desktop;
 building the system configuration...
 error:
        … while evaluating the attribute 'config.system.build.toplevel'
@@ -79,11 +79,11 @@ error:
 
        (stack trace truncated; use '--show-trace' to show the full trace)
 
-       error: syntax error, unexpected '=', expecting ';'
+       error: undefined variable 'mpv'
 
-       at /etc/nixos/configuration.nix:231:16:
+       at /etc/nixos/configuration.nix:230:18:
 
-          230|             "audio/mpeg"=mpv.desktop
-          231|                 "audio/x-mp3"=mpv.desktop
-             |                ^
-          232|                "audio/x-wav"=mpv.desktop
+          229|                # Audio
+          230|          "audio/mpeg" = mpv.desktop;
+             |                  ^
+          231|            "audio/x-mp3" = mpv.desktop;