Assertion throws err message on fail in buildLuaPackage

pkgs/development/lua-modules/generic/default.nix

···
 
 { buildInputs ? [], disabled ? false, ... } @ attrs:
 
-assert !disabled;
+if disabled then
+  throw "${attrs.name} not supported by interpreter lua-${lua.luaversion}"
+else
+  lua.stdenv.mkDerivation ({
 
-lua.stdenv.mkDerivation ({
-
-    preBuild = ''
-      makeFlagsArray=(
-        PREFIX=$out
-        LUA_LIBDIR="$out/lib/lua/${lua.luaversion}"
-        LUA_INC="-I${lua}/include");
-    '';
-  }
-  //
-  attrs
-  //
-  {
-    name = "lua${lua.luaversion}-" + attrs.name;
-    buildInputs = buildInputs ++ [ lua ];
-  }
-)
+      preBuild = ''
+        makeFlagsArray=(
+          PREFIX=$out
+          LUA_LIBDIR="$out/lib/lua/${lua.luaversion}"
+          LUA_INC="-I${lua}/include");
+      '';
+    }
+    //
+    attrs
+    //
+    {
+      name = "lua${lua.luaversion}-" + attrs.name;
+      buildInputs = buildInputs ++ [ lua ];
+    }
+  )

pkgs/top-level/lua-packages.nix

···
 {fetchurl, stdenv, lua}:
 
 let self = _self; _self = with self; {
-
   inherit (stdenv.lib) maintainers;
 
   #define build lua package function