Fix JDK build

This reverts commit 32838d386a.

flake.lock

@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1720863214,
-        "narHash": "sha256-i2MaeZlmE85eZtILHzZdb0blm15xcq7ASbhHa8ILiLI=",
+        "lastModified": 1764934844,
+        "narHash": "sha256-P+MyCHPVEXUB7j1lQCjWo6Ke9/SGkKCWbyyVeXkude8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "267ce10433ba68de208074a2faf9d31f048593f3",
+        "rev": "1177aa56e17909379c74d86c60d51f92f2f1e8e4",
         "type": "github"
       },
       "original": {

jdk.nix

@@ -1,12 +1,11 @@
 {
-  buildPlatform,
-  hostPlatform,
+  stdenv,
   jdk21,
   which,
   zip,
   buildPackages,
 }:
-if buildPlatform == hostPlatform
+if stdenv.buildPlatform == stdenv.hostPlatform
 then jdk21
 else
   jdk21.overrideAttrs (old: {
@@ -18,7 +17,6 @@ else
       old.configureFlags
       ++ [
         "--with-jtreg=no"
-        "--disable-hotspot-gtest"
         "--with-build-jdk=${buildPackages.jdk21}"
       ];
   })