diff --git a/.buildkite/cmakecheck.yml b/.buildkite/cmakecheck.yml
new file mode 100644
--- /dev/null
+++ b/.buildkite/cmakecheck.yml
@@ -0,0 +1,9 @@
+steps:
+  - label: "CMake Lint (Nix)"
+    command:
+      - 'nix shell github:nixos/nixpkgs/nixpkgs-22.05#cmake-format -c cmake-lint **/CMakeLists.txt'
+    plugins:
+      - docker#v3.13.0:
+          image: 'nixos/nix:latest'
+    agents:
+      - 'autoscaling=true'
diff --git a/services/tunnelbroker/CMakeLists.txt b/services/tunnelbroker/CMakeLists.txt
--- a/services/tunnelbroker/CMakeLists.txt
+++ b/services/tunnelbroker/CMakeLists.txt
@@ -60,7 +60,9 @@
 
 file(GLOB_RECURSE SOURCE_CODE "./src/*.cpp")
 set(GENERATED_CODE ${proto_srcs} ${proto_hdrs} ${grpc_srcs} ${grpc_hdrs})
-file(GLOB DOUBLE_CONVERSION_SOURCES "./lib/double-conversion/double-conversion/*.cc")
+file(GLOB DOUBLE_CONVERSION_SOURCES
+  "./lib/double-conversion/double-conversion/*.cc"
+)
 
 include_directories(
   ./src