More JDK specificity

java/flake.lock

@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1659049902,
-        "narHash": "sha256-eFyEAnwY/9U+8W/6qam++osVH7ec3D7IXGBHKNk6p4g=",
+        "lastModified": 1659050511,
+        "narHash": "sha256-JqDvJv3kiVMvwfA2NVbzmB/dx+LxJWhTXUCi5morzD4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "42ad817998d134577ee8788f4cc2c52f04c71f5b",
+        "rev": "57b2048cc8c34f9a2e3a2edc196e9a98efc3862f",
         "type": "github"
       },
       "original": {

java/flake.nix

@@ -9,12 +9,17 @@
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let
-        pkgs = import nixpkgs { inherit system; };
+        jdk = "jdk17";
 
-        java = pkgs.jdk17;
+        config = {
+          packageOverrides = p: {
+            gradle = (p.gradle.override { java = p.${jdk}; });
+          };
+        };
 
+        pkgs = import nixpkgs { inherit config jdk system; };
+        java = pkgs.${jdk};
         buildTools = with pkgs; [ ant gradle maven ];
-
         inherit (pkgs) mkShell;
       in {
         devShells = {