authentik: fix webui deps hash

[LisaScheers]

Follow-up to #523484.

Fixes the authentik-webui-deps fixed-output hash for x86_64-linux after the 2026.5.3 update. The previous hash fails with a fixed-output mismatch; this uses the hash reported by Nix for the generated web UI dependency closure.

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.
• Follows the automation/AI policy.

Validation:

• git diff --check
• NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-instantiate --eval --strict -A authentik.version --system x86_64-linux
• NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-instantiate -A authentik --system x86_64-linux

Full Linux builds were not completed from this aarch64-darwin host because the configured Linux builders were unavailable.

[liberodark]

✅ nixpkgs-review result

Generated using nixpkgs-review-gha (0a7f1f5)

Command: nixpkgs-review pr 536579
Commit: b27de91a89e2e06c8aa145f6b03268afca71c994 (subsequent changes)
Merge: e682cf7b8a383f3dd4f88395e8e433be2bc4a187

Logs: https://github.com/liberodark/nixpkgs-review-gha/actions/runs/28360048113/attempts/1

---

x86_64-linux

✅ 1 package built:

• authentik

---

aarch64-linux

✅ No rebuilds

---

x86_64-darwin

✅ No rebuilds

---

aarch64-darwin

✅ No rebuilds

[jvanbruegge]

nixpkgs-review result

Generated using nixpkgs-review.

Command: nixpkgs-review pr 536579
Commit: b27de91a89e2e06c8aa145f6b03268afca71c994

---

x86_64-linux

✅ 1 package built:

• authentik

[nixpkgs-review-gha]

✅ nixpkgs-review result

Generated using nixpkgs-review-gha (0a7f1f5)

Command: nixpkgs-review pr 536579
Commit: b27de91a89e2e06c8aa145f6b03268afca71c994 (subsequent changes)
Merge: e682cf7b8a383f3dd4f88395e8e433be2bc4a187

Triggered by @LisaScheers (34404302)
Logs: https://github.com/LisaScheers/nixpkgs-review-gha/actions/runs/28360322376/attempts/1

---

x86_64-linux

✅ 1 package built:

• authentik

---

aarch64-linux

✅ No rebuilds