diff --git a/flake.lock b/flake.lock
index d5f0995..2270df4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -47,17 +47,15 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1718228457,
-        "narHash": "sha256-vGumESUGu/jo2Lm5bha/xBsJKVlb1wuclXlL9xudRp4=",
-        "ref": "refs/heads/main",
-        "rev": "f46194faa2fc9c78250702c8eb7a4b756e0bd944",
-        "revCount": 15757,
-        "type": "git",
-        "url": "https://git@git.lix.systems/lix-project/lix"
+        "lastModified": 1718590005,
+        "narHash": "sha256-fiWc1ZyMlTXXSjcmoEQ+NHhIgtcImPHszbOu5c515cU=",
+        "rev": "98d0249d5c7f5dcc1d2436c4829f073fca668f80",
+        "type": "tarball",
+        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/98d0249d5c7f5dcc1d2436c4829f073fca668f80.tar.gz"
       },
       "original": {
-        "type": "git",
-        "url": "https://git@git.lix.systems/lix-project/lix"
+        "type": "tarball",
+        "url": "https://git.lix.systems/lix-project/lix/archive/release-2.90.tar.gz"
       }
     },
     "nix-github-actions": {
@@ -98,16 +96,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1718132686,
-        "narHash": "sha256-JRinkq+FeAkYnrrK8+Bh+jtLHJBN5jDzSimk1ye00EE=",
+        "lastModified": 1718676691,
+        "narHash": "sha256-DWKbARWtRpT1yiLLm+5vMijx65YB7NwGZMV6NXOtrJ8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "96b3dae4f8753c1f5ce0d06b57fe250fb5d9b0e0",
+        "rev": "d9e18354acbf59c625505b7315c85508e9831bf4",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.11-small",
+        "ref": "nixos-24.05-small",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index e3a589b..5fdcfb4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "Hydra's builtin hydra-eval-jobs as a standalone";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11-small";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05-small";
   inputs.flake-parts.url = "github:hercules-ci/flake-parts";
   inputs.flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
   inputs.treefmt-nix.url = "github:numtide/treefmt-nix";
@@ -9,7 +9,7 @@
   inputs.nix-github-actions.url = "github:nix-community/nix-github-actions";
   inputs.nix-github-actions.inputs.nixpkgs.follows = "nixpkgs";
   inputs.lix = {
-    url = "git+https://git@git.lix.systems/lix-project/lix";
+    url = "https://git.lix.systems/lix-project/lix/archive/release-2.90.tar.gz";
     inputs.nixpkgs.follows = "nixpkgs";
   };
 
diff --git a/meson.build b/meson.build
index 60dfef7..15708a6 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,11 @@
 project('nix-eval-jobs', 'cpp',
   version : '0.1.6',
   license : 'GPL-3.0',
+  default_options : [
+    'debug=true',
+    'optimization=2',
+    'cpp_std=c++20',
+  ],
 )
 
 nix_main_dep = dependency('lix-main', required: true)
diff --git a/src/meson.build b/src/meson.build
index 745e036..4ece592 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,10 +1,10 @@
-src = [
+src = files(
   'nix-eval-jobs.cc',
   'eval-args.cc',
   'drv.cc',
   'buffered-io.cc',
-  'worker.cc'
-]
+  'worker.cc',
+)
 
 cc = meson.get_compiler('cpp')
 
@@ -31,4 +31,4 @@ executable('nix-eval-jobs', src,
              threads_dep
            ],
            install: true,
-           cpp_args: ['-std=c++2a', '--include', 'autotools-config.h'])
+           cpp_args: ['--include', 'autotools-config.h'])