diff --git a/.tangled/workflows/base.yml b/.tangled/workflows/base.yml
new file mode 100644
index 0000000..c37b14b
--- /dev/null
+++ b/.tangled/workflows/base.yml
@@ -0,0 +1,19 @@
+when:
+  - event: ["push", "manual"]
+    branch: ["main"]
+  - event: ["pull_request"]
+    branch: ["main"]
+
+engine: microvm
+image: nixos
+
+clone:
+  skip: false
+  depth: 1
+
+dependencies:
+  - devenv
+
+steps:
+  - name: "Smoke test devenv"
+    command: devenv shell echo 'hello'
diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
index ebe7ce1..1032ef2 100644
--- a/.tangled/workflows/build.yml
+++ b/.tangled/workflows/build.yml
@@ -12,23 +12,8 @@ clone:
 
 dependencies:
   nixpkgs:
-    - cachix
     - devenv
 
 steps:
-  - name: Debug
-    command: |
-      set -eux
-      pwd
-      id
-      ls -la
-      find . -maxdepth 2 -type f | sort
-      git status || true
-      which devenv || true
-      devenv version || true
-      nix --version || true
-      devenv info || true
-      devenv shell -- echo ok
-
-  - name: "Test"
-    command: devenv shell -- echo "Build cached"
+  - name: "Smoke test devenv"
+    command: devenv shell echo 'hello'