diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
new file mode 100644
index 0000000..5347a27
--- /dev/null
+++ b/.tangled/workflows/build.yml
@@ -0,0 +1,16 @@
+when:
+  - event: ["push", "pull_request"]
+    branch: ["main"]
+
+dependencies:
+  nixpkgs:
+    - gcc
+    - cargo
+    - rustc
+    - rustfmt
+
+steps:
+  - name: build
+    command: |
+       cargo build --all
+
diff --git a/.tangled/workflows/fmt.yml b/.tangled/workflows/fmt.yml
index a1bded9..b83c058 100644
--- a/.tangled/workflows/fmt.yml
+++ b/.tangled/workflows/fmt.yml
@@ -9,6 +9,6 @@ dependencies:
     - rustfmt
 
 steps:
-  - name: "cargo fmt"
+  - name: format
     command: |
        cargo fmt --all --check