diff --git a/.buildkite/tunnelbroker_unittests.yml b/.buildkite/tunnelbroker_unittests.yml
--- a/.buildkite/tunnelbroker_unittests.yml
+++ b/.buildkite/tunnelbroker_unittests.yml
@@ -1,12 +1,15 @@
-env:
-  PATH: '$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:$PATH'
 steps:
-  - label: ':nix: Tunnelbroker Unittests'
+  - label: 'Tunnelbroker Unittests'
     command:
+      - 'apt update && apt install -y autoconf libtool build-essential cmake git'
+      - './scripts/install_protobuf.sh'
       - 'cd services/tunnelbroker'
-      - 'rm -rf target'
-      - 'nix develop --accept-flake-config -c bash -c "cargo build && cargo test"'
+      - 'cargo test'
     retry:
       automatic: true
+    plugins:
+      - docker#v5.3.0:
+          image: 'rust:1.74.0'
+          propagate-environment: true
     agents:
-      - 'mac=true'
+      - 'autoscaling=true'