diff --git a/src/machine.rs b/src/machine.rs
new file mode 100644
index 0000000..d986c8f
--- /dev/null
+++ b/src/machine.rs
@@ -0,0 +1,30 @@
+use std::path::PathBuf;
+
+use crate::Result;
+
+
+#[test]
+fn api_design() {
+    let host = Local::new();
+    let target = LocalRoot::new();
+    let system = (host, target);
+
+    let result = system.build("github:NixOS/nixpkgs#hello^out");
+    system.run([
+        "ln",
+        "-vsfT",
+        result,
+        "/tmp/foo"
+    ]);
+}
+
+pub trait System {
+    fn new() -> Self;
+
+    fn build(&self) -> Result<PathBuf>;
+}
+
+pub struct SystemT<Host, Target> {
+    host: Host,
+    target: Target
+}
diff --git a/src/main.rs b/src/main.rs
index 8b164d3..a6e9d1f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,6 +7,7 @@ mod logging;
 mod nixos;
 mod search;
 mod util;
+mod machine;
 
 use crate::interface::NHParser;
 use crate::interface::NHRunnable;