diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
new file mode 100644
index 0000000..6b26340
--- /dev/null
+++ b/.tangled/workflows/build.yml
@@ -0,0 +1,16 @@
+when:
+  - event: ["push", "manual"]
+    branch: ["main", "develop"]
+  - event: ["pull_request"]
+    branch: ["main"]
+
+engine: microvm
+image: nixos
+
+dependencies:
+  - cachix
+  - devenv
+
+steps:
+  - name: "Test"
+    command: devenv shell -- echo "Build cached"
diff --git a/devenv.nix b/devenv.nix
index ec7e612..37e8f83 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -15,5 +15,8 @@
 
   languages.nix.enable = true;
 
+  # https://app.cachix.org/cache/rssbase#pull
+  cachix.pull = [ "rssbase" ];
+
   # See full reference at https://devenv.sh/reference/options/
 }