looking-glass-client: switch to finalAttrs

pkgs/applications/virtualization/looking-glass-client/default.nix

@@ -47,14 +47,14 @@ let
     icon = "lg-logo";
   };
 in
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "looking-glass-client";
   version = "B7-rc1";
 
   src = fetchFromGitHub {
     owner = "gnif";
     repo = "LookingGlass";
-    rev = version;
+    rev = finalAttrs.version;
     hash = "sha256-ne1Q+67+P8RHcTsqdiSSwkFf0g3pSNT91WN/lsSzssU=";
     fetchSubmodules = true;
   };
@@ -80,7 +80,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals (!pipewireSupport) [ "-DENABLE_PIPEWIRE=no" ];
 
   postUnpack = ''
-    echo ${src.rev} > source/VERSION
+    echo ${finalAttrs.src.rev} > source/VERSION
     export sourceRoot="source/client"
   '';
 
@@ -105,4 +105,4 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ alexbakker babbaj j-brn ];
     platforms = [ "x86_64-linux" ];
   };
-}
+})