install direnv and switch back to slssteam flake

modules/home/mpd.nix

@@ -22,7 +22,7 @@
         path   "/tmp/mpd.fifo"
         format "44100:16:2"
       }
-      auto_update	"yes"
+      # auto_update	"yes"
       max_playlist_length "131072"
       max_output_buffer_size "32768"
     '';

modules/shell.nix

@@ -23,6 +23,7 @@
       ssh = "kitten ssh";
       nd = "nix develop";
       df = "df -h -x tmpfs -x devtmpfs -x squashfs -x overlay -x efivarfs";
+      ms = "music-sort";
     };
   };
 
@@ -60,6 +61,15 @@
 
   programs.tmux.enable = true;
 
+  programs.direnv = {
+    enable = true;
+    nix-direnv.enable = true;
+    enableFishIntegration = true;
+    config = {
+      hide_env_diff = true;
+    };
+  };
+
   programs.bat = {
     enable = true;
     config = {