diff --git a/flake.lock b/flake.lock
index 569e05c7..25882917 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,20 +1,12 @@
 {
   "nodes": {
     "crane": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-overlay": "rust-overlay"
-      },
       "locked": {
-        "lastModified": 1688772518,
-        "narHash": "sha256-ol7gZxwvgLnxNSZwFTDJJ49xVY5teaSvF7lzlo3YQfM=",
+        "lastModified": 1731974733,
+        "narHash": "sha256-enYSSZVVl15FI5p+0Y5/Ckf5DZAvXe6fBrHxyhA/njc=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "8b08e96c9af8c6e3a2b69af5a7fa168750fcf88e",
+        "rev": "3cb338ce81076ce5e461cf77f7824476addb0e1c",
         "type": "github"
       },
       "original": {
@@ -39,22 +31,6 @@
         "type": "github"
       }
     },
-    "flake-compat_2": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
@@ -77,24 +53,6 @@
       "inputs": {
         "systems": "systems"
       },
-      "locked": {
-        "lastModified": 1687709756,
-        "narHash": "sha256-Y5wKlQSkgEK2weWdOu4J3riRd+kV/VCgHsqLNTTWQ/0=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_2": {
-      "inputs": {
-        "systems": "systems_2"
-      },
       "locked": {
         "lastModified": 1685518550,
         "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
@@ -109,9 +67,9 @@
         "type": "github"
       }
     },
-    "flake-utils_3": {
+    "flake-utils_2": {
       "inputs": {
-        "systems": "systems_3"
+        "systems": "systems_2"
       },
       "locked": {
         "lastModified": 1681202837,
@@ -150,11 +108,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1687412861,
-        "narHash": "sha256-Z/g0wbL68C+mSGerYS2quv9FXQ1RRP082cAC0Bh4vcs=",
+        "lastModified": 1731676054,
+        "narHash": "sha256-OZiZ3m8SCMfh3B6bfGC/Bm4x3qc1m2SVEAlkV6iY7Yg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e603dc5f061ca1d8a19b3ede6a8cf9c9fcba6cdc",
+        "rev": "5e4fbfb6b3de1aa2872b76d49fafc942626e2add",
         "type": "github"
       },
       "original": {
@@ -248,8 +206,8 @@
     },
     "pre-commit-hooks-nix": {
       "inputs": {
-        "flake-compat": "flake-compat_2",
-        "flake-utils": "flake-utils_2",
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
         "gitignore": "gitignore",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-stable": "nixpkgs-stable"
@@ -270,11 +228,11 @@
     },
     "process-compose-flake": {
       "locked": {
-        "lastModified": 1689870193,
-        "narHash": "sha256-qZgtMtMoPKtH1u/9BiWB8B+pVYLcuZwBdnKB7bRZExQ=",
+        "lastModified": 1731079499,
+        "narHash": "sha256-ir7WTVpG999N07wkOCs1kwZsQKitOv3CNDqNalCMK3c=",
         "owner": "Platonic-Systems",
         "repo": "process-compose-flake",
-        "rev": "0e2aab0ba17c098838813979251a4363b26b0875",
+        "rev": "018783e68c89f94dbe11ce918d6206e9e4138787",
         "type": "github"
       },
       "original": {
@@ -290,40 +248,15 @@
         "nixpkgs": "nixpkgs",
         "pre-commit-hooks-nix": "pre-commit-hooks-nix",
         "process-compose-flake": "process-compose-flake",
-        "rust-overlay": "rust-overlay_2",
+        "rust-overlay": "rust-overlay",
         "services-flake": "services-flake",
-        "systems": "systems_4",
+        "systems": "systems_3",
         "treefmt-nix": "treefmt-nix"
       }
     },
     "rust-overlay": {
       "inputs": {
-        "flake-utils": [
-          "crane",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "crane",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1688351637,
-        "narHash": "sha256-CLTufJ29VxNOIZ8UTg0lepsn3X03AmopmaLTTeHDCL4=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "f9b92316727af9e6c7fee4a761242f7f46880329",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
-    "rust-overlay_2": {
-      "inputs": {
-        "flake-utils": "flake-utils_3",
+        "flake-utils": "flake-utils_2",
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
@@ -342,11 +275,11 @@
     },
     "services-flake": {
       "locked": {
-        "lastModified": 1693308844,
-        "narHash": "sha256-JDOCKKR8kREeKd7/nMPNPhT2F/bGADxyoy3B7GWWKw8=",
+        "lastModified": 1731803425,
+        "narHash": "sha256-VnMt3bJhzrDYpNkp2NYpIqTAJnY645SCxxZBMlWxtiA=",
         "owner": "juspay",
         "repo": "services-flake",
-        "rev": "b93a612aa7057fbb395c79a915672f9b6567ffea",
+        "rev": "a6ef2d67aa91aaa7866bc53027b970d0c47da7df",
         "type": "github"
       },
       "original": {
@@ -400,21 +333,6 @@
         "type": "github"
       }
     },
-    "systems_4": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": "nixpkgs_4"
diff --git a/flake.nix b/flake.nix
index 2f230a52..cacd80a8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,7 +7,6 @@
     # Rust
     rust-overlay.url = "github:oxalica/rust-overlay";
     crane.url = "github:ipetkov/crane";
-    crane.inputs.nixpkgs.follows = "nixpkgs";
 
     # Dev tools
     treefmt-nix.url = "github:numtide/treefmt-nix";
diff --git a/nix/services.nix b/nix/services.nix
index 7c742948..07dea3c3 100644
--- a/nix/services.nix
+++ b/nix/services.nix
@@ -3,7 +3,7 @@
   perSystem = { config, self', pkgs, lib, system, ... }:
 
     {
-      process-compose."lts-services" = {
+      process-compose."lts-services" = pc: {
         imports = [
           inputs.services-flake.processComposeModules.default
         ];
@@ -16,12 +16,22 @@
           port = 6381;
         };
         services.zookeeper."zookeeper1".enable = true;
-        services.apache-kafka."kafka1".enable = true;
+        services.apache-kafka."kafka1" = {
+          enable = true;
+          settings = {
+            "zookeeper.connect" = with pc.config.services.zookeeper; [ "localhost:${builtins.toString zookeeper1.port}" ];
+          };
+        };
+        # kafka should start only after zookeeper is healthy
+        settings.processes."kafka1".depends_on."zookeeper1".condition = "process_healthy";
       };
 
       # Flake outputs
       devShells.services = pkgs.mkShell {
-        nativeBuildInputs = [
+        inputsFrom = [
+          config.process-compose."lts-services".services.outputs.devShell
+        ];
+        packages = [
           config.process-compose."lts-services".outputs.package
         ];
       };