flake.nix

@@ -9,12 +9,13 @@
   outputs = { self, nixpkgs, utils }: let
     packages = utils.lib.eachDefaultSystem (system: let
       pkgs = import nixpkgs { inherit system; };
-      mpvScript = { owner, repo, rev, sha256, scriptName }: pkgs.stdenvNoCC.mkDerivation {
+      mpvScript = { owner, repo, rev, sha256, scriptName, patches ? [] }: pkgs.stdenvNoCC.mkDerivation {
         pname = repo;
         version = builtins.substring 0 6 rev;
         src = pkgs.fetchFromGitHub {
           inherit owner repo rev sha256;
         };
+        inherit patches;
         dontBuild = true;
         installPhase = ''
           install -Dm644 ${scriptName} $out/share/mpv/scripts/${scriptName}
@@ -28,6 +29,9 @@
         rev = "5d2fb7ab73fc0e36d44109e75c9be26bd42084e2";
         sha256 = "0dyh2kyvivj81lrkyqhc3czmi9hqjkh7xg8dqjnnr3kh3yn62dpi";
         scriptName = "sub-select.lua";
+        patches = [
+          ./sub-select-path.patch
+        ];
       };
 
       packages.segment-linking = mpvScript {
@@ -42,8 +46,25 @@
     packages // rec {
       overlays.default = final: prev: let
         newScripts = packages.packages.${prev.system};
-      in {
-        mpv = prev.mpv.override { scripts = builtins.attrValues newScripts; };
+      in rec {
+        mpv-unwrapped = prev.mpv-unwrapped.overrideAttrs (oldAttrs:
+          if oldAttrs ? wafConfigureFlags
+          then {
+            wafConfigureFlags = oldAttrs.wafConfigureFlags ++ [
+              "--confloaddir=/etc/mpv"
+            ];
+          }
+          else if oldAttrs ? mesonFlags
+          then {
+            mesonFlags = oldAttrs.mesonFlags ++ [
+              "-Dsysconfdir=/etc"
+            ];
+          }
+          else oldAttrs
+        );
+        mpv = prev.wrapMpv mpv-unwrapped {
+          scripts = builtins.attrValues newScripts;
+        };
         mpvScripts = prev.mpvScripts // newScripts;
       };
 
@@ -55,9 +76,7 @@
           pkgs.mkvtoolnix
         ];
 
-        home-manager.sharedModules = [ ({ config, ... }: {
-          config = lib.mkIf config.programs.mpv.enable {
-            xdg.configFile."mpv/script-opts/sub-select.json".text = builtins.toJSON [
+        environment.etc."mpv/script-opts/sub-select.json".text = builtins.toJSON [
           {
             alang = "j[ap]n?";
             slang = [ "eng?" "und" ];
@@ -93,7 +112,5 @@
           }
         ];
       };
-        }) ];
-      };
     };
 }

sub-select-path.patch

@@ -0,0 +1,13 @@
+diff --git a/sub-select.lua b/sub-select.lua
+index f61025b..1d8edc8 100644
+--- a/sub-select.lua
++++ b/sub-select.lua
+@@ -73,7 +73,7 @@ local function type_check(val, t, required)
+ end
+ 
+ local function setup_prefs()
+-    local file = assert(io.open(mp.command_native({"expand-path", o.config}) .. "/sub-select.json"))
++    local file = assert(io.open(mp.command_native({"expand-path", o.config .. "/sub-select.json"})))
+     local json = file:read("*all")
+     file:close()
+     prefs = utils.parse_json(json)