diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..b19286e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,7 @@
+[workspace]
+resolver = "2"
+
+members = [
+    "rosenpass",
+]
+
diff --git a/flake.nix b/flake.nix
index 4e76269..fe43169 100644
--- a/flake.nix
+++ b/flake.nix
@@ -112,6 +112,9 @@
                   version = cargoToml.package.version;
                   inherit src;
 
+                  cargoBuildOptions = x: x ++ [ "-p" "rosenpass" ];
+                  cargoTestOptions = x: x ++ [ "-p" "rosenpass" ];
+
                   doCheck = true;
 
                   nativeBuildInputs = with pkgs; [