Fix CI toolchain selection

evolution/proposals/BEP-0009-release-infrastructure-and-store-upload-pipeline.md

@@ -55,6 +55,16 @@ The same change also makes the forge itself the release authority: release tags
   cache is available. macOS runners should use the local Bazel disk/repository
   cache path and skip the `nsc` remote-cache auth probe, which is optional and
   can block without GNU timeout support.
+- The Nix CI shell must not pin Apple builds to a Bazel major that disagrees
+  with `.bazelversion`. Prefer Bazelisk or a Bazel 9 package so the release
+  lane uses the repository-declared Bazel 9.1.0 toolchain.
+- Moving tarball URLs are not acceptable for release-critical Nix inputs. The
+  forge worker lockfile must resolve nixpkgs through a fixed Git revision so
+  fresh workers do not fail when a branch tarball no longer matches a stored
+  NAR hash.
+- The CI shell should prefer currently supported Node runtimes when nixpkgs
+  marks an older major insecure. Release workers must fail on product build
+  errors, not on avoidable toolchain end-of-life policy checks.
 - Produce unsigned Apple validation artifacts when signing is absent, but require signing for an App Store requested iOS release and for a Sparkle tester release. Uploadable artifacts are produced only after provisioning profiles can be synced from App Store Connect credentials and the relevant Apple certificate is proven to match the selected Google KMS key.
 - Resolve release credentials through age/agenix before signed Apple lanes run. Forgejo secrets should carry only the runner age identity fallback and the Authentik WIF client secret until OpenBao can mint the runner token directly. App Store Connect keys and signing certificates live as sealed files under `secrets/`.
 - Persist the forge runner SSH key as `/var/lib/forgejo-runner-agent/age_keystore` and export `BURROW_RUNNER_AGE_IDENTITY_PATH` so jobs can resolve agenix identities without embedding long-lived material in every workflow.

flake.lock

@@ -113,14 +113,18 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1773389992,
-        "narHash": "sha256-wvfdLLWJ2I9oEpDd9PfMA8osfIZicoQ5MT1jIwNs9Tk=",
-        "type": "tarball",
-        "url": "https://codeload.github.com/NixOS/nixpkgs/tar.gz/nixos-unstable"
+        "lastModified": 1780243769,
+        "narHash": "sha256-x5UQuRsH3MqI0U9afaXSNqzTPSeZlRLvFAav2Ux1pNw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "331800de5053fcebacf6813adb5db9c9dca22a0c",
+        "type": "github"
       },
       "original": {
-        "type": "tarball",
-        "url": "https://codeload.github.com/NixOS/nixpkgs/tar.gz/nixos-unstable"
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "nsc-autoscaler": {

flake.nix

@@ -2,7 +2,7 @@
   description = "Burrow development shell and forge host configuration";
 
   inputs = {
-    nixpkgs.url = "tarball+https://codeload.github.com/NixOS/nixpkgs/tar.gz/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "tarball+https://codeload.github.com/numtide/flake-utils/tar.gz/main";
     agenix = {
       url = "github:ryantm/agenix";
@@ -39,17 +39,28 @@
         };
         lib = pkgs.lib;
         bazelPkg =
-          if lib.hasAttr "bazel_7" pkgs then
-            pkgs.bazel_7
+          if lib.hasAttr "bazelisk" pkgs then
+            pkgs.bazelisk
+          else if lib.hasAttr "bazel_9" pkgs then
+            pkgs.bazel_9
           else if lib.hasAttr "bazel" pkgs then
             pkgs.bazel
           else
-            pkgs.bazelisk;
+            pkgs.bazel_7;
         buildifierPkg =
           if lib.hasAttr "buildifier" pkgs then
             pkgs.buildifier
           else
             pkgs.bazel-buildtools;
+        nodejsPkg =
+          if lib.hasAttr "nodejs_22" pkgs then
+            pkgs.nodejs_22
+          else if lib.hasAttr "nodejs_24" pkgs then
+            pkgs.nodejs_24
+          else if lib.hasAttr "nodejs" pkgs then
+            pkgs.nodejs
+          else
+            pkgs.nodejs_20;
         optionalPackage = name: lib.optional (lib.hasAttr name pkgs) (lib.getAttr name pkgs);
         googleKmsPkcs11Package =
           if pkgs.stdenv.hostPlatform.isx86_64 && pkgs.stdenv.isLinux then
@@ -125,7 +136,7 @@ EOF
           opentofu
           curl
           jq
-          nodejs_20
+          nodejsPkg
           python3
           openssl
           rsync