use nix-eval-jobs from nixpkgs

buildbot_nix/buildbot_nix.py

@@ -433,13 +433,7 @@ def nix_eval_config(
             name="evaluate flake",
             supported_systems=supported_systems,
             command=[
-                "nix",
-                "run",
-                "--option",
-                "accept-flake-config",
-                "true",
-                "github:nix-community/nix-eval-jobs",
-                "--",
+                "nix-eval-jobs",
                 "--workers",
                 multiprocessing.cpu_count(),
                 "--max-memory-size",

nix/worker.nix

@@ -53,6 +53,7 @@ in
         pkgs.openssh
         pkgs.gh
         pkgs.nix
+        pkgs.nix-eval-jobs
       ];
       environment.PYTHONPATH = "${python.withPackages (_: [cfg.package])}/${python.sitePackages}";
       environment.MASTER_URL = ''tcp:host=localhost:port=9989'';