diff --git a/applications/devel-kotlin.nix b/applications/devel-kotlin.nix
index e9badca..15e7473 100644
--- a/applications/devel-kotlin.nix
+++ b/applications/devel-kotlin.nix
@@ -1,7 +1,8 @@
-{ config, lib, pkgs, inputs, unstable, ... }:
+{ config, lib, pkgs, java, unstable, ... }:
 
 {
   environment.systemPackages = with unstable; [
+    java.packages.${system}.semeru-stable
     kotlin
     kotlin-native
     kotlin-language-server
diff --git a/flake.lock b/flake.lock
index 8e9288d..f63ea63 100644
--- a/flake.lock
+++ b/flake.lock
@@ -277,6 +277,27 @@
         "type": "github"
       }
     },
+    "java": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "utils": "utils_2"
+      },
+      "locked": {
+        "lastModified": 1655182547,
+        "narHash": "sha256-gmkb6l13CVKtlRydDJ9O3sifKtamKLgLdUaEASdQ6Ls=",
+        "owner": "nathans-flakes",
+        "repo": "java",
+        "rev": "8e53bfead6195e4440aef47b2f08b0e7f89b1d4d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nathans-flakes",
+        "repo": "java",
+        "type": "github"
+      }
+    },
     "libnbtplusplus": {
       "flake": false,
       "locked": {
@@ -618,6 +639,7 @@
         "emacs": "emacs",
         "fenix": "fenix",
         "home-manager": "home-manager",
+        "java": "java",
         "mozilla": "mozilla",
         "nix-doom-emacs": "nix-doom-emacs",
         "nixpkgs": "nixpkgs_2",
@@ -695,6 +717,21 @@
         "repo": "flake-utils",
         "type": "github"
       }
+    },
+    "utils_2": {
+      "locked": {
+        "lastModified": 1653893745,
+        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 6e194b3..541ef61 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,6 +37,10 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.emacs-overlay.follows = "emacs";
     };
+    java = {
+      url = "github:nathans-flakes/java";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
@@ -51,6 +55,7 @@
     , darwin
     , polymc
     , nix-doom-emacs
+    , java
     }@attrs:
     let
       baseModules = [